CVE-2026-8959
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
CVE-2026-8959 is fixed in 440 products on 3 platforms, first by Firefox Developer Edition (ach) 151.0, released May 13, 2026. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 3 platforms
CVSS
9.6
important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0042
36th percentile
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Firefox Developer Edition (ach) | 151.0 | Firefox Developer Edition (ach) 151.0 | May 13, 2026 |
| Firefox Developer Edition (af) | 151.0 | Firefox Developer Edition (af) 151.0 | May 13, 2026 |
| Firefox Developer Edition (an) | 151.0 | Firefox Developer Edition (an) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ar) | 151.0 | Firefox Developer Edition (ar) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ast) | 151.0 | Firefox Developer Edition (ast) 151.0 | May 13, 2026 |
| Firefox Developer Edition (az) | 151.0 | Firefox Developer Edition (az) 151.0 | May 13, 2026 |
| Firefox Developer Edition (be) | 151.0 | Firefox Developer Edition (be) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bg) | 151.0 | Firefox Developer Edition (bg) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bn) | 151.0 | Firefox Developer Edition (bn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (br) | 151.0 | Firefox Developer Edition (br) 151.0 | May 13, 2026 |
| Firefox Developer Edition (bs) | 151.0 | Firefox Developer Edition (bs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ca) | 151.0 | Firefox Developer Edition (ca) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ca-valencia) | 151.0 | Firefox Developer Edition (ca-valencia) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cak) | 151.0 | Firefox Developer Edition (cak) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cs) | 151.0 | Firefox Developer Edition (cs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (cy) | 151.0 | Firefox Developer Edition (cy) 151.0 | May 13, 2026 |
| Firefox Developer Edition (da) | 151.0 | Firefox Developer Edition (da) 151.0 | May 13, 2026 |
| Firefox Developer Edition (de) | 151.0 | Firefox Developer Edition (de) 151.0 | May 13, 2026 |
| Firefox Developer Edition (dsb) | 151.0 | Firefox Developer Edition (dsb) 151.0 | May 13, 2026 |
| Firefox Developer Edition (el) | 151.0 | Firefox Developer Edition (el) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-CA) | 151.0 | Firefox Developer Edition (en-CA) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-GB) | 151.0 | Firefox Developer Edition (en-GB) 151.0 | May 13, 2026 |
| Firefox Developer Edition (en-US) | 151.0 | Firefox Developer Edition (en-US) 151.0 | May 13, 2026 |
| Firefox Developer Edition (eo) | 151.0 | Firefox Developer Edition (eo) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-AR) | 151.0 | Firefox Developer Edition (es-AR) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-CL) | 151.0 | Firefox Developer Edition (es-CL) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-ES) | 151.0 | Firefox Developer Edition (es-ES) 151.0 | May 13, 2026 |
| Firefox Developer Edition (es-MX) | 151.0 | Firefox Developer Edition (es-MX) 151.0 | May 13, 2026 |
| Firefox Developer Edition (et) | 151.0 | Firefox Developer Edition (et) 151.0 | May 13, 2026 |
| Firefox Developer Edition (eu) | 151.0 | Firefox Developer Edition (eu) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fa) | 151.0 | Firefox Developer Edition (fa) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ff) | 151.0 | Firefox Developer Edition (ff) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fi) | 151.0 | Firefox Developer Edition (fi) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fr) | 151.0 | Firefox Developer Edition (fr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fur) | 151.0 | Firefox Developer Edition (fur) 151.0 | May 13, 2026 |
| Firefox Developer Edition (fy-NL) | 151.0 | Firefox Developer Edition (fy-NL) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ga-IE) | 151.0 | Firefox Developer Edition (ga-IE) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gd) | 151.0 | Firefox Developer Edition (gd) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gl) | 151.0 | Firefox Developer Edition (gl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gn) | 151.0 | Firefox Developer Edition (gn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (gu-IN) | 151.0 | Firefox Developer Edition (gu-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (he) | 151.0 | Firefox Developer Edition (he) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hi-IN) | 151.0 | Firefox Developer Edition (hi-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hr) | 151.0 | Firefox Developer Edition (hr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hsb) | 151.0 | Firefox Developer Edition (hsb) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hu) | 151.0 | Firefox Developer Edition (hu) 151.0 | May 13, 2026 |
| Firefox Developer Edition (hy-AM) | 151.0 | Firefox Developer Edition (hy-AM) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ia) | 151.0 | Firefox Developer Edition (ia) 151.0 | May 13, 2026 |
| Firefox Developer Edition (id) | 151.0 | Firefox Developer Edition (id) 151.0 | May 13, 2026 |
| Firefox Developer Edition (is) | 151.0 | Firefox Developer Edition (is) 151.0 | May 13, 2026 |
| Firefox Developer Edition (it) | 151.0 | Firefox Developer Edition (it) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ja) | 151.0 | Firefox Developer Edition (ja) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ka) | 151.0 | Firefox Developer Edition (ka) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kab) | 151.0 | Firefox Developer Edition (kab) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kk) | 151.0 | Firefox Developer Edition (kk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (km) | 151.0 | Firefox Developer Edition (km) 151.0 | May 13, 2026 |
| Firefox Developer Edition (kn) | 151.0 | Firefox Developer Edition (kn) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ko) | 151.0 | Firefox Developer Edition (ko) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lij) | 151.0 | Firefox Developer Edition (lij) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lt) | 151.0 | Firefox Developer Edition (lt) 151.0 | May 13, 2026 |
| Firefox Developer Edition (lv) | 151.0 | Firefox Developer Edition (lv) 151.0 | May 13, 2026 |
| Firefox Developer Edition (mk) | 151.0 | Firefox Developer Edition (mk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (mr) | 151.0 | Firefox Developer Edition (mr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ms) | 151.0 | Firefox Developer Edition (ms) 151.0 | May 13, 2026 |
| Firefox Developer Edition (my) | 151.0 | Firefox Developer Edition (my) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nb-NO) | 151.0 | Firefox Developer Edition (nb-NO) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ne-NP) | 151.0 | Firefox Developer Edition (ne-NP) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nl) | 151.0 | Firefox Developer Edition (nl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (nn-NO) | 151.0 | Firefox Developer Edition (nn-NO) 151.0 | May 13, 2026 |
| Firefox Developer Edition (oc) | 151.0 | Firefox Developer Edition (oc) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pa-IN) | 151.0 | Firefox Developer Edition (pa-IN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pl) | 151.0 | Firefox Developer Edition (pl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pt-BR) | 151.0 | Firefox Developer Edition (pt-BR) 151.0 | May 13, 2026 |
| Firefox Developer Edition (pt-PT) | 151.0 | Firefox Developer Edition (pt-PT) 151.0 | May 13, 2026 |
| Firefox Developer Edition (rm) | 151.0 | Firefox Developer Edition (rm) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ro) | 151.0 | Firefox Developer Edition (ro) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ru) | 151.0 | Firefox Developer Edition (ru) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sc) | 151.0 | Firefox Developer Edition (sc) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sco) | 151.0 | Firefox Developer Edition (sco) 151.0 | May 13, 2026 |
| Firefox Developer Edition (si) | 151.0 | Firefox Developer Edition (si) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sk) | 151.0 | Firefox Developer Edition (sk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sl) | 151.0 | Firefox Developer Edition (sl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (son) | 151.0 | Firefox Developer Edition (son) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sq) | 151.0 | Firefox Developer Edition (sq) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sr) | 151.0 | Firefox Developer Edition (sr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (sv-SE) | 151.0 | Firefox Developer Edition (sv-SE) 151.0 | May 13, 2026 |
| Firefox Developer Edition (szl) | 151.0 | Firefox Developer Edition (szl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ta) | 151.0 | Firefox Developer Edition (ta) 151.0 | May 13, 2026 |
| Firefox Developer Edition (te) | 151.0 | Firefox Developer Edition (te) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tg) | 151.0 | Firefox Developer Edition (tg) 151.0 | May 13, 2026 |
| Firefox Developer Edition (th) | 151.0 | Firefox Developer Edition (th) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tl) | 151.0 | Firefox Developer Edition (tl) 151.0 | May 13, 2026 |
| Firefox Developer Edition (tr) | 151.0 | Firefox Developer Edition (tr) 151.0 | May 13, 2026 |
| Firefox Developer Edition (trs) | 151.0 | Firefox Developer Edition (trs) 151.0 | May 13, 2026 |
| Firefox Developer Edition (uk) | 151.0 | Firefox Developer Edition (uk) 151.0 | May 13, 2026 |
| Firefox Developer Edition (ur) | 151.0 | Firefox Developer Edition (ur) 151.0 | May 13, 2026 |
| Firefox Developer Edition (uz) | 151.0 | Firefox Developer Edition (uz) 151.0 | May 13, 2026 |
| Firefox Developer Edition (vi) | 151.0 | Firefox Developer Edition (vi) 151.0 | May 13, 2026 |
| Firefox Developer Edition (xh) | 151.0 | Firefox Developer Edition (xh) 151.0 | May 13, 2026 |
| Firefox Developer Edition (zh-CN) | 151.0 | Firefox Developer Edition (zh-CN) 151.0 | May 13, 2026 |
| Firefox Developer Edition (zh-TW) | 151.0 | Firefox Developer Edition (zh-TW) 151.0 | May 13, 2026 |
| Mozilla Firefox (ach) | 151.0 | Mozilla Firefox (ach) 151.0 | May 19, 2026 |
| Mozilla Firefox (af) | 151.0 | Mozilla Firefox (af) 151.0 | May 19, 2026 |
| Mozilla Firefox (an) | 151.0 | Mozilla Firefox (an) 151.0 | May 19, 2026 |
| Mozilla Firefox (ar) | 151.0 | Mozilla Firefox (ar) 151.0 | May 19, 2026 |
| Mozilla Firefox (ast) | 151.0 | Mozilla Firefox (ast) 151.0 | May 19, 2026 |
| Mozilla Firefox (az) | 151.0 | Mozilla Firefox (az) 151.0 | May 19, 2026 |
| Mozilla Firefox (be) | 151.0 | Mozilla Firefox (be) 151.0 | May 19, 2026 |
| Mozilla Firefox (bg) | 151.0 | Mozilla Firefox (bg) 151.0 | May 19, 2026 |
| Mozilla Firefox (bn) | 151.0 | Mozilla Firefox (bn) 151.0 | May 19, 2026 |
| Mozilla Firefox (br) | 151.0 | Mozilla Firefox (br) 151.0 | May 19, 2026 |
| Mozilla Firefox (bs) | 151.0 | Mozilla Firefox (bs) 151.0 | May 19, 2026 |
| Mozilla Firefox (ca) | 151.0 | Mozilla Firefox (ca) 151.0 | May 19, 2026 |
| Mozilla Firefox (ca-valencia) | 151.0 | Mozilla Firefox (ca-valencia) 151.0 | May 19, 2026 |
| Mozilla Firefox (cak) | 151.0 | Mozilla Firefox (cak) 151.0 | May 19, 2026 |
| Mozilla Firefox (cs) | 151.0 | Mozilla Firefox (cs) 151.0 | May 19, 2026 |
| Mozilla Firefox (cy) | 151.0 | Mozilla Firefox (cy) 151.0 | May 19, 2026 |
| Mozilla Firefox (da) | 151.0 | Mozilla Firefox (da) 151.0 | May 19, 2026 |
| Mozilla Firefox (de) | 151.0 | Mozilla Firefox (de) 151.0 | May 19, 2026 |
| Mozilla Firefox (dsb) | 151.0 | Mozilla Firefox (dsb) 151.0 | May 19, 2026 |
| Mozilla Firefox (el) | 151.0 | Mozilla Firefox (el) 151.0 | May 19, 2026 |
| Mozilla Firefox (en-CA) | 151.0 | Mozilla Firefox (en-CA) 151.0 | May 19, 2026 |
| Mozilla Firefox (en-GB) | 151.0 | Mozilla Firefox (en-GB) 151.0 | May 19, 2026 |
| Mozilla Firefox (en-US) | 151.0 | Mozilla Firefox (en-US) 151.0 | May 19, 2026 |
| Mozilla Firefox (eo) | 151.0 | Mozilla Firefox (eo) 151.0 | May 19, 2026 |
| Mozilla Firefox (es-AR) | 151.0 | Mozilla Firefox (es-AR) 151.0 | May 19, 2026 |
| Mozilla Firefox (es-CL) | 151.0 | Mozilla Firefox (es-CL) 151.0 | May 19, 2026 |
| Mozilla Firefox (es-ES) | 151.0 | Mozilla Firefox (es-ES) 151.0 | May 19, 2026 |
| Mozilla Firefox (es-MX) | 151.0 | Mozilla Firefox (es-MX) 151.0 | May 19, 2026 |
| Mozilla Firefox (et) | 151.0 | Mozilla Firefox (et) 151.0 | May 19, 2026 |
| Mozilla Firefox (eu) | 151.0 | Mozilla Firefox (eu) 151.0 | May 19, 2026 |
| Mozilla Firefox (fa) | 151.0 | Mozilla Firefox (fa) 151.0 | May 19, 2026 |
| Mozilla Firefox (ff) | 151.0 | Mozilla Firefox (ff) 151.0 | May 19, 2026 |
| Mozilla Firefox (fi) | 151.0 | Mozilla Firefox (fi) 151.0 | May 19, 2026 |
| Mozilla Firefox (fr) | 151.0 | Mozilla Firefox (fr) 151.0 | May 19, 2026 |
| Mozilla Firefox (fur) | 151.0 | Mozilla Firefox (fur) 151.0 | May 19, 2026 |
| Mozilla Firefox (fy-NL) | 151.0 | Mozilla Firefox (fy-NL) 151.0 | May 19, 2026 |
| Mozilla Firefox (ga-IE) | 151.0 | Mozilla Firefox (ga-IE) 151.0 | May 19, 2026 |
| Mozilla Firefox (gd) | 151.0 | Mozilla Firefox (gd) 151.0 | May 19, 2026 |
| Mozilla Firefox (gl) | 151.0 | Mozilla Firefox (gl) 151.0 | May 19, 2026 |
| Mozilla Firefox (gn) | 151.0 | Mozilla Firefox (gn) 151.0 | May 19, 2026 |
| Mozilla Firefox (gu-IN) | 151.0 | Mozilla Firefox (gu-IN) 151.0 | May 19, 2026 |
| Mozilla Firefox (he) | 151.0 | Mozilla Firefox (he) 151.0 | May 19, 2026 |
| Mozilla Firefox (hi-IN) | 151.0 | Mozilla Firefox (hi-IN) 151.0 | May 19, 2026 |
| Mozilla Firefox (hr) | 151.0 | Mozilla Firefox (hr) 151.0 | May 19, 2026 |
| Mozilla Firefox (hsb) | 151.0 | Mozilla Firefox (hsb) 151.0 | May 19, 2026 |
| Mozilla Firefox (hu) | 151.0 | Mozilla Firefox (hu) 151.0 | May 19, 2026 |
| Mozilla Firefox (hy-AM) | 151.0 | Mozilla Firefox (hy-AM) 151.0 | May 19, 2026 |
| Mozilla Firefox (ia) | 151.0 | Mozilla Firefox (ia) 151.0 | May 19, 2026 |
| Mozilla Firefox (id) | 151.0 | Mozilla Firefox (id) 151.0 | May 19, 2026 |
| Mozilla Firefox (is) | 151.0 | Mozilla Firefox (is) 151.0 | May 19, 2026 |
| Mozilla Firefox (it) | 151.0 | Mozilla Firefox (it) 151.0 | May 19, 2026 |
| Mozilla Firefox (ja) | 151.0 | Mozilla Firefox (ja) 151.0 | May 19, 2026 |
| Mozilla Firefox (ka) | 151.0 | Mozilla Firefox (ka) 151.0 | May 19, 2026 |
| Mozilla Firefox (kab) | 151.0 | Mozilla Firefox (kab) 151.0 | May 19, 2026 |
| Mozilla Firefox (kk) | 151.0 | Mozilla Firefox (kk) 151.0 | May 19, 2026 |
| Mozilla Firefox (km) | 151.0 | Mozilla Firefox (km) 151.0 | May 19, 2026 |
| Mozilla Firefox (kn) | 151.0 | Mozilla Firefox (kn) 151.0 | May 19, 2026 |
| Mozilla Firefox (ko) | 151.0 | Mozilla Firefox (ko) 151.0 | May 19, 2026 |
| Mozilla Firefox (lij) | 151.0 | Mozilla Firefox (lij) 151.0 | May 19, 2026 |
| Mozilla Firefox (lt) | 151.0 | Mozilla Firefox (lt) 151.0 | May 19, 2026 |
| Mozilla Firefox (lv) | 151.0 | Mozilla Firefox (lv) 151.0 | May 19, 2026 |
| Mozilla Firefox (mk) | 151.0 | Mozilla Firefox (mk) 151.0 | May 19, 2026 |
| Mozilla Firefox (mr) | 151.0 | Mozilla Firefox (mr) 151.0 | May 19, 2026 |
| Mozilla Firefox (ms) | 151.0 | Mozilla Firefox (ms) 151.0 | May 19, 2026 |
| Mozilla Firefox (my) | 151.0 | Mozilla Firefox (my) 151.0 | May 19, 2026 |
| Mozilla Firefox (nb-NO) | 151.0 | Mozilla Firefox (nb-NO) 151.0 | May 19, 2026 |
| Mozilla Firefox (ne-NP) | 151.0 | Mozilla Firefox (ne-NP) 151.0 | May 19, 2026 |
| Mozilla Firefox (nl) | 151.0 | Mozilla Firefox (nl) 151.0 | May 19, 2026 |
| Mozilla Firefox (nn-NO) | 151.0 | Mozilla Firefox (nn-NO) 151.0 | May 19, 2026 |
| Mozilla Firefox (oc) | 151.0 | Mozilla Firefox (oc) 151.0 | May 19, 2026 |
| Mozilla Firefox (pa-IN) | 151.0 | Mozilla Firefox (pa-IN) 151.0 | May 19, 2026 |
| Mozilla Firefox (pl) | 151.0 | Mozilla Firefox (pl) 151.0 | May 19, 2026 |
| Mozilla Firefox (pt-BR) | 151.0 | Mozilla Firefox (pt-BR) 151.0 | May 19, 2026 |
| Mozilla Firefox (pt-PT) | 151.0 | Mozilla Firefox (pt-PT) 151.0 | May 19, 2026 |
| Mozilla Firefox (rm) | 151.0 | Mozilla Firefox (rm) 151.0 | May 19, 2026 |
| Mozilla Firefox (ro) | 151.0 | Mozilla Firefox (ro) 151.0 | May 19, 2026 |
| Mozilla Firefox (ru) | 151.0 | Mozilla Firefox (ru) 151.0 | May 19, 2026 |
| Mozilla Firefox (sc) | 151.0 | Mozilla Firefox (sc) 151.0 | May 19, 2026 |
| Mozilla Firefox (sco) | 151.0 | Mozilla Firefox (sco) 151.0 | May 19, 2026 |
| Mozilla Firefox (si) | 151.0 | Mozilla Firefox (si) 151.0 | May 19, 2026 |
| Mozilla Firefox (sk) | 151.0 | Mozilla Firefox (sk) 151.0 | May 19, 2026 |
| Mozilla Firefox (sl) | 151.0 | Mozilla Firefox (sl) 151.0 | May 19, 2026 |
| Mozilla Firefox (son) | 151.0 | Mozilla Firefox (son) 151.0 | May 19, 2026 |
| Mozilla Firefox (sq) | 151.0 | Mozilla Firefox (sq) 151.0 | May 19, 2026 |
| Mozilla Firefox (sr) | 151.0 | Mozilla Firefox (sr) 151.0 | May 19, 2026 |
| Mozilla Firefox (sv-SE) | 151.0 | Mozilla Firefox (sv-SE) 151.0 | May 19, 2026 |
| Mozilla Firefox (szl) | 151.0 | Mozilla Firefox (szl) 151.0 | May 19, 2026 |
| Mozilla Firefox (ta) | 151.0 | Mozilla Firefox (ta) 151.0 | May 19, 2026 |
| Mozilla Firefox (te) | 151.0 | Mozilla Firefox (te) 151.0 | May 19, 2026 |
| Mozilla Firefox (tg) | 151.0 | Mozilla Firefox (tg) 151.0 | May 19, 2026 |
| Mozilla Firefox (th) | 151.0 | Mozilla Firefox (th) 151.0 | May 19, 2026 |
| Mozilla Firefox (tl) | 151.0 | Mozilla Firefox (tl) 151.0 | May 19, 2026 |
| Mozilla Firefox (tr) | 151.0 | Mozilla Firefox (tr) 151.0 | May 19, 2026 |
| Mozilla Firefox (trs) | 151.0 | Mozilla Firefox (trs) 151.0 | May 19, 2026 |
| Mozilla Firefox (uk) | 151.0 | Mozilla Firefox (uk) 151.0 | May 19, 2026 |
| Mozilla Firefox (ur) | 151.0 | Mozilla Firefox (ur) 151.0 | May 19, 2026 |
| Mozilla Firefox (uz) | 151.0 | Mozilla Firefox (uz) 151.0 | May 19, 2026 |
| Mozilla Firefox (vi) | 151.0 | Mozilla Firefox (vi) 151.0 | May 19, 2026 |
| Mozilla Firefox (xh) | 151.0 | Mozilla Firefox (xh) 151.0 | May 19, 2026 |
| Mozilla Firefox (zh-CN) | 151.0 | Mozilla Firefox (zh-CN) 151.0 | May 19, 2026 |
| Mozilla Firefox (zh-TW) | 151.0 | Mozilla Firefox (zh-TW) 151.0 | May 19, 2026 |
| Mozilla Firefox ESR (ach) | 153.0.0 | Mozilla Firefox ESR (ach) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (af) | 153.0.0 | Mozilla Firefox ESR (af) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (an) | 153.0.0 | Mozilla Firefox ESR (an) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ar) | 153.0.0 | Mozilla Firefox ESR (ar) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ast) | 153.0.0 | Mozilla Firefox ESR (ast) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (az) | 153.0.0 | Mozilla Firefox ESR (az) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (be) | 153.0.0 | Mozilla Firefox ESR (be) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bg) | 153.0.0 | Mozilla Firefox ESR (bg) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bn) | 153.0.0 | Mozilla Firefox ESR (bn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (br) | 153.0.0 | Mozilla Firefox ESR (br) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (bs) | 153.0.0 | Mozilla Firefox ESR (bs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ca) | 153.0.0 | Mozilla Firefox ESR (ca) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ca-valencia) | 153.0.0 | Mozilla Firefox ESR (ca-valencia) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cak) | 153.0.0 | Mozilla Firefox ESR (cak) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cs) | 153.0.0 | Mozilla Firefox ESR (cs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (cy) | 153.0.0 | Mozilla Firefox ESR (cy) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (da) | 153.0.0 | Mozilla Firefox ESR (da) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (de) | 153.0.0 | Mozilla Firefox ESR (de) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (dsb) | 153.0.0 | Mozilla Firefox ESR (dsb) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (el) | 153.0.0 | Mozilla Firefox ESR (el) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-CA) | 153.0.0 | Mozilla Firefox ESR (en-CA) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-GB) | 153.0.0 | Mozilla Firefox ESR (en-GB) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (en-US) | 153.0.0 | Mozilla Firefox ESR (en-US) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (eo) | 153.0.0 | Mozilla Firefox ESR (eo) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-AR) | 153.0.0 | Mozilla Firefox ESR (es-AR) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-CL) | 153.0.0 | Mozilla Firefox ESR (es-CL) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-ES) | 153.0.0 | Mozilla Firefox ESR (es-ES) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (es-MX) | 153.0.0 | Mozilla Firefox ESR (es-MX) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (et) | 153.0.0 | Mozilla Firefox ESR (et) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (eu) | 153.0.0 | Mozilla Firefox ESR (eu) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fa) | 153.0.0 | Mozilla Firefox ESR (fa) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ff) | 153.0.0 | Mozilla Firefox ESR (ff) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fi) | 153.0.0 | Mozilla Firefox ESR (fi) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fr) | 153.0.0 | Mozilla Firefox ESR (fr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fur) | 153.0.0 | Mozilla Firefox ESR (fur) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (fy-NL) | 153.0.0 | Mozilla Firefox ESR (fy-NL) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ga-IE) | 153.0.0 | Mozilla Firefox ESR (ga-IE) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gd) | 153.0.0 | Mozilla Firefox ESR (gd) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gl) | 153.0.0 | Mozilla Firefox ESR (gl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gn) | 153.0.0 | Mozilla Firefox ESR (gn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (gu-IN) | 153.0.0 | Mozilla Firefox ESR (gu-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (he) | 153.0.0 | Mozilla Firefox ESR (he) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hi-IN) | 153.0.0 | Mozilla Firefox ESR (hi-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hr) | 153.0.0 | Mozilla Firefox ESR (hr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hsb) | 153.0.0 | Mozilla Firefox ESR (hsb) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hu) | 153.0.0 | Mozilla Firefox ESR (hu) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (hy-AM) | 153.0.0 | Mozilla Firefox ESR (hy-AM) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ia) | 153.0.0 | Mozilla Firefox ESR (ia) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (id) | 153.0.0 | Mozilla Firefox ESR (id) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (is) | 153.0.0 | Mozilla Firefox ESR (is) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (it) | 153.0.0 | Mozilla Firefox ESR (it) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ja) | 153.0.0 | Mozilla Firefox ESR (ja) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ka) | 153.0.0 | Mozilla Firefox ESR (ka) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kab) | 153.0.0 | Mozilla Firefox ESR (kab) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kk) | 153.0.0 | Mozilla Firefox ESR (kk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (km) | 153.0.0 | Mozilla Firefox ESR (km) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (kn) | 153.0.0 | Mozilla Firefox ESR (kn) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ko) | 153.0.0 | Mozilla Firefox ESR (ko) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lij) | 153.0.0 | Mozilla Firefox ESR (lij) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lt) | 153.0.0 | Mozilla Firefox ESR (lt) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (lv) | 153.0.0 | Mozilla Firefox ESR (lv) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (mk) | 153.0.0 | Mozilla Firefox ESR (mk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (mr) | 153.0.0 | Mozilla Firefox ESR (mr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ms) | 153.0.0 | Mozilla Firefox ESR (ms) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (my) | 153.0.0 | Mozilla Firefox ESR (my) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nb-NO) | 153.0.0 | Mozilla Firefox ESR (nb-NO) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ne-NP) | 153.0.0 | Mozilla Firefox ESR (ne-NP) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nl) | 153.0.0 | Mozilla Firefox ESR (nl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (nn-NO) | 153.0.0 | Mozilla Firefox ESR (nn-NO) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (oc) | 153.0.0 | Mozilla Firefox ESR (oc) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pa-IN) | 153.0.0 | Mozilla Firefox ESR (pa-IN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pl) | 153.0.0 | Mozilla Firefox ESR (pl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pt-BR) | 153.0.0 | Mozilla Firefox ESR (pt-BR) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (pt-PT) | 153.0.0 | Mozilla Firefox ESR (pt-PT) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (rm) | 153.0.0 | Mozilla Firefox ESR (rm) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ro) | 153.0.0 | Mozilla Firefox ESR (ro) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ru) | 153.0.0 | Mozilla Firefox ESR (ru) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sat) | 153.0.0 | Mozilla Firefox ESR (sat) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sc) | 153.0.0 | Mozilla Firefox ESR (sc) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sco) | 153.0.0 | Mozilla Firefox ESR (sco) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (si) | 153.0.0 | Mozilla Firefox ESR (si) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sk) | 153.0.0 | Mozilla Firefox ESR (sk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sl) | 153.0.0 | Mozilla Firefox ESR (sl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (son) | 153.0.0 | Mozilla Firefox ESR (son) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sq) | 153.0.0 | Mozilla Firefox ESR (sq) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sr) | 153.0.0 | Mozilla Firefox ESR (sr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (sv-SE) | 153.0.0 | Mozilla Firefox ESR (sv-SE) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (szl) | 153.0.0 | Mozilla Firefox ESR (szl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ta) | 153.0.0 | Mozilla Firefox ESR (ta) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (te) | 153.0.0 | Mozilla Firefox ESR (te) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tg) | 153.0.0 | Mozilla Firefox ESR (tg) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (th) | 153.0.0 | Mozilla Firefox ESR (th) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tl) | 153.0.0 | Mozilla Firefox ESR (tl) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (tr) | 153.0.0 | Mozilla Firefox ESR (tr) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (trs) | 153.0.0 | Mozilla Firefox ESR (trs) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (uk) | 153.0.0 | Mozilla Firefox ESR (uk) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (ur) | 153.0.0 | Mozilla Firefox ESR (ur) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (uz) | 153.0.0 | Mozilla Firefox ESR (uz) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (vi) | 153.0.0 | Mozilla Firefox ESR (vi) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (xh) | 153.0.0 | Mozilla Firefox ESR (xh) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (zh-CN) | 153.0.0 | Mozilla Firefox ESR (zh-CN) 153.0.0 | Jul 20, 2026 |
| Mozilla Firefox ESR (zh-TW) | 153.0.0 | Mozilla Firefox ESR (zh-TW) 153.0.0 | Jul 20, 2026 |
| Mozilla Thunderbird (af) | 151.0 | Mozilla Thunderbird (af) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ar) | 151.0 | Mozilla Thunderbird (ar) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ast) | 151.0 | Mozilla Thunderbird (ast) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (be) | 151.0 | Mozilla Thunderbird (be) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (bg) | 151.0 | Mozilla Thunderbird (bg) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (br) | 151.0 | Mozilla Thunderbird (br) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ca) | 151.0 | Mozilla Thunderbird (ca) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (cak) | 151.0 | Mozilla Thunderbird (cak) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (cs) | 151.0 | Mozilla Thunderbird (cs) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (cy) | 151.0 | Mozilla Thunderbird (cy) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (da) | 151.0 | Mozilla Thunderbird (da) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (de) | 151.0 | Mozilla Thunderbird (de) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (dsb) | 151.0 | Mozilla Thunderbird (dsb) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (el) | 151.0 | Mozilla Thunderbird (el) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (en-CA) | 151.0 | Mozilla Thunderbird (en-CA) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (en-GB) | 151.0 | Mozilla Thunderbird (en-GB) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (en-US) | 151.0 | Mozilla Thunderbird (en-US) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (es-AR) | 151.0 | Mozilla Thunderbird (es-AR) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (es-ES) | 151.0 | Mozilla Thunderbird (es-ES) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (es-MX) | 151.0 | Mozilla Thunderbird (es-MX) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (et) | 151.0 | Mozilla Thunderbird (et) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (eu) | 151.0 | Mozilla Thunderbird (eu) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (fi) | 151.0 | Mozilla Thunderbird (fi) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (fr) | 151.0 | Mozilla Thunderbird (fr) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (fy-NL) | 151.0 | Mozilla Thunderbird (fy-NL) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ga-IE) | 151.0 | Mozilla Thunderbird (ga-IE) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (gd) | 151.0 | Mozilla Thunderbird (gd) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (gl) | 151.0 | Mozilla Thunderbird (gl) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (he) | 151.0 | Mozilla Thunderbird (he) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (hr) | 151.0 | Mozilla Thunderbird (hr) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (hsb) | 151.0 | Mozilla Thunderbird (hsb) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (hu) | 151.0 | Mozilla Thunderbird (hu) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (hy-AM) | 151.0 | Mozilla Thunderbird (hy-AM) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (id) | 151.0 | Mozilla Thunderbird (id) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (is) | 151.0 | Mozilla Thunderbird (is) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (it) | 151.0 | Mozilla Thunderbird (it) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ja) | 151.0 | Mozilla Thunderbird (ja) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ka) | 151.0 | Mozilla Thunderbird (ka) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (kab) | 151.0 | Mozilla Thunderbird (kab) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (kk) | 151.0 | Mozilla Thunderbird (kk) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ko) | 151.0 | Mozilla Thunderbird (ko) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (lt) | 151.0 | Mozilla Thunderbird (lt) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (lv) | 151.0 | Mozilla Thunderbird (lv) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ms) | 151.0 | Mozilla Thunderbird (ms) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (nb-NO) | 151.0 | Mozilla Thunderbird (nb-NO) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (nl) | 151.0 | Mozilla Thunderbird (nl) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (nn-NO) | 151.0 | Mozilla Thunderbird (nn-NO) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (pa-IN) | 151.0 | Mozilla Thunderbird (pa-IN) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (pl) | 151.0 | Mozilla Thunderbird (pl) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (pt-BR) | 151.0 | Mozilla Thunderbird (pt-BR) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (pt-PT) | 151.0 | Mozilla Thunderbird (pt-PT) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (rm) | 151.0 | Mozilla Thunderbird (rm) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ro) | 151.0 | Mozilla Thunderbird (ro) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (ru) | 151.0 | Mozilla Thunderbird (ru) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (sk) | 151.0 | Mozilla Thunderbird (sk) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (sl) | 151.0 | Mozilla Thunderbird (sl) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (sq) | 151.0 | Mozilla Thunderbird (sq) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (sr) | 151.0 | Mozilla Thunderbird (sr) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (sv-SE) | 151.0 | Mozilla Thunderbird (sv-SE) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (th) | 151.0 | Mozilla Thunderbird (th) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (tr) | 151.0 | Mozilla Thunderbird (tr) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (uk) | 151.0 | Mozilla Thunderbird (uk) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (uz) | 151.0 | Mozilla Thunderbird (uz) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (vi) | 151.0 | Mozilla Thunderbird (vi) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (zh-CN) | 151.0 | Mozilla Thunderbird (zh-CN) 151.0 | May 19, 2026 |
| Mozilla Thunderbird (zh-TW) | 151.0 | Mozilla Thunderbird (zh-TW) 151.0 | May 19, 2026 |
| Mozilla Thunderbird ESR (af) | 153.0.1 | Mozilla Thunderbird ESR (af) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ar) | 153.0.1 | Mozilla Thunderbird ESR (ar) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ast) | 153.0.1 | Mozilla Thunderbird ESR (ast) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (be) | 153.0.1 | Mozilla Thunderbird ESR (be) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (bg) | 153.0.1 | Mozilla Thunderbird ESR (bg) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (br) | 153.0.1 | Mozilla Thunderbird ESR (br) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ca) | 153.0.1 | Mozilla Thunderbird ESR (ca) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cak) | 153.0.1 | Mozilla Thunderbird ESR (cak) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cs) | 153.0.1 | Mozilla Thunderbird ESR (cs) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (cy) | 153.0.1 | Mozilla Thunderbird ESR (cy) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (da) | 153.0.1 | Mozilla Thunderbird ESR (da) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (de) | 153.0.1 | Mozilla Thunderbird ESR (de) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (dsb) | 153.0.1 | Mozilla Thunderbird ESR (dsb) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (el) | 153.0.1 | Mozilla Thunderbird ESR (el) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-CA) | 153.0.1 | Mozilla Thunderbird ESR (en-CA) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-GB) | 153.0.1 | Mozilla Thunderbird ESR (en-GB) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (en-US) | 153.0.1 | Mozilla Thunderbird ESR (en-US) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-AR) | 153.0.1 | Mozilla Thunderbird ESR (es-AR) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-ES) | 153.0.1 | Mozilla Thunderbird ESR (es-ES) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (es-MX) | 153.0.1 | Mozilla Thunderbird ESR (es-MX) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (et) | 153.0.1 | Mozilla Thunderbird ESR (et) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (eu) | 153.0.1 | Mozilla Thunderbird ESR (eu) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fi) | 153.0.1 | Mozilla Thunderbird ESR (fi) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fr) | 153.0.1 | Mozilla Thunderbird ESR (fr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (fy-NL) | 153.0.1 | Mozilla Thunderbird ESR (fy-NL) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ga-IE) | 153.0.1 | Mozilla Thunderbird ESR (ga-IE) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (gd) | 153.0.1 | Mozilla Thunderbird ESR (gd) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (gl) | 153.0.1 | Mozilla Thunderbird ESR (gl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (he) | 153.0.1 | Mozilla Thunderbird ESR (he) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hr) | 153.0.1 | Mozilla Thunderbird ESR (hr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hsb) | 153.0.1 | Mozilla Thunderbird ESR (hsb) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hu) | 153.0.1 | Mozilla Thunderbird ESR (hu) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (hy-AM) | 153.0.1 | Mozilla Thunderbird ESR (hy-AM) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (id) | 153.0.1 | Mozilla Thunderbird ESR (id) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (is) | 153.0.1 | Mozilla Thunderbird ESR (is) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (it) | 153.0.1 | Mozilla Thunderbird ESR (it) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ja) | 153.0.1 | Mozilla Thunderbird ESR (ja) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ka) | 153.0.1 | Mozilla Thunderbird ESR (ka) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (kab) | 153.0.1 | Mozilla Thunderbird ESR (kab) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (kk) | 153.0.1 | Mozilla Thunderbird ESR (kk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ko) | 153.0.1 | Mozilla Thunderbird ESR (ko) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (lt) | 153.0.1 | Mozilla Thunderbird ESR (lt) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (lv) | 153.0.1 | Mozilla Thunderbird ESR (lv) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ms) | 153.0.1 | Mozilla Thunderbird ESR (ms) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nb-NO) | 153.0.1 | Mozilla Thunderbird ESR (nb-NO) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nl) | 153.0.1 | Mozilla Thunderbird ESR (nl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (nn-NO) | 153.0.1 | Mozilla Thunderbird ESR (nn-NO) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pa-IN) | 153.0.1 | Mozilla Thunderbird ESR (pa-IN) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pl) | 153.0.1 | Mozilla Thunderbird ESR (pl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pt-BR) | 153.0.1 | Mozilla Thunderbird ESR (pt-BR) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (pt-PT) | 153.0.1 | Mozilla Thunderbird ESR (pt-PT) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (rm) | 153.0.1 | Mozilla Thunderbird ESR (rm) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ro) | 153.0.1 | Mozilla Thunderbird ESR (ro) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (ru) | 153.0.1 | Mozilla Thunderbird ESR (ru) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sk) | 153.0.1 | Mozilla Thunderbird ESR (sk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sl) | 153.0.1 | Mozilla Thunderbird ESR (sl) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sq) | 153.0.1 | Mozilla Thunderbird ESR (sq) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sr) | 153.0.1 | Mozilla Thunderbird ESR (sr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (sv-SE) | 153.0.1 | Mozilla Thunderbird ESR (sv-SE) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (th) | 153.0.1 | Mozilla Thunderbird ESR (th) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (tr) | 153.0.1 | Mozilla Thunderbird ESR (tr) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (uk) | 153.0.1 | Mozilla Thunderbird ESR (uk) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (uz) | 153.0.1 | Mozilla Thunderbird ESR (uz) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (vi) | 153.0.1 | Mozilla Thunderbird ESR (vi) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (zh-CN) | 153.0.1 | Mozilla Thunderbird ESR (zh-CN) 153.0.1 | Jul 23, 2026 |
| Mozilla Thunderbird ESR (zh-TW) | 153.0.1 | Mozilla Thunderbird ESR (zh-TW) 153.0.1 | Jul 23, 2026 |
| macOS | |||
| Mozilla Firefox | 151.0.2 | Mozilla Firefox 151.0.2 | May 25, 2026 |
| Mozilla Thunderbird | 151.0.1 | Mozilla Thunderbird 151.0.1 | May 22, 2026 |
| Linux | |||
| MozillaThunderbird · opensuse-leap 16.0 | 140.12.0-bp160.1.1 | OPENSUSE-SU-2026:21168-1 | Jun 29, 2026 |
| thunderbird · RHEL 10 | 140.11.0-1.el10_0 | RHSA-2026:26539 | May 19, 2026 |
| thunderbird · RHEL 8 | 0:140.11.0-1.el8_10 | RHSA-2026:22643 | Jun 24, 2026 |
| thunderbird · RHEL 9 | 0:140.11.0-1.el9_8 | RHSA-2026:21381 | May 27, 2026 |
| thunderbird · almalinux 10 | 140.11.0-1.el10_2.alma.1 | ALSA-2026:22325 | Jun 1, 2026 |
| thunderbird · almalinux 8 | 140.11.0-1.el8_10.alma.1 | ALSA-2026:22643 | Jun 2, 2026 |
| thunderbird · almalinux 9 | 140.11.0-1.el9_8.alma.1 | ALSA-2026:21381 | May 27, 2026 |
| thunderbird · ol 10 | 0:140.12.0-1.0.1.el10_2 | ELSA-2026-22325 | Jul 17, 2026 |
| thunderbird · ol 8 | 0:140.11.0-1.0.1.el8_10 | ELSA-2026-22643 | Jun 3, 2026 |
| thunderbird · ol 9 | 0:140.11.0-1.0.1.el9_8 | ELSA-2026-21381 | Jun 23, 2026 |
| thunderbird · rocky 10 | 0:140.11.0-1.el10_2 | RLSA-2026:22325 | Jun 5, 2026 |
| thunderbird · rocky 8 | 0:140.11.0-1.el8_10 | RLSA-2026:22643 | Jun 6, 2026 |
| thunderbird · rocky 9 | 0:140.11.0-1.el9_8 | RLSA-2026:21381 | May 30, 2026 |
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