CVE-2026-8945
Sandbox escape in Firefox and Firefox Focus for Android
CVE-2026-8945 is fixed in 305 products on 2 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 2 platforms
CVSS
7.5
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0037
31st percentile
Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.
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 |
| macOS | |||
| Mozilla Firefox | 151.0.2 | Mozilla Firefox 151.0.2 | May 25, 2026 |
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