CVE-2026-4723
Use-after-free in the JavaScript Engine component
CVE-2026-4723 is fixed in 305 products on 2 platforms, first by Firefox Developer Edition (ach) 149.0, released March 13, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
UrgentFixed on 2 platforms
CVSS
9.8
No vendor severity
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0062
49th percentile
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Firefox Developer Edition (ach) | 149.0 | Firefox Developer Edition (ach) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (af) | 149.0 | Firefox Developer Edition (af) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (an) | 149.0 | Firefox Developer Edition (an) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ar) | 149.0 | Firefox Developer Edition (ar) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ast) | 149.0 | Firefox Developer Edition (ast) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (az) | 149.0 | Firefox Developer Edition (az) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (be) | 149.0 | Firefox Developer Edition (be) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (bg) | 149.0 | Firefox Developer Edition (bg) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (bn) | 149.0 | Firefox Developer Edition (bn) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (br) | 149.0 | Firefox Developer Edition (br) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (bs) | 149.0 | Firefox Developer Edition (bs) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ca) | 149.0 | Firefox Developer Edition (ca) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ca-valencia) | 149.0 | Firefox Developer Edition (ca-valencia) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (cak) | 149.0 | Firefox Developer Edition (cak) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (cs) | 149.0 | Firefox Developer Edition (cs) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (cy) | 149.0 | Firefox Developer Edition (cy) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (da) | 149.0 | Firefox Developer Edition (da) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (de) | 149.0 | Firefox Developer Edition (de) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (dsb) | 149.0 | Firefox Developer Edition (dsb) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (el) | 149.0 | Firefox Developer Edition (el) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (en-CA) | 149.0 | Firefox Developer Edition (en-CA) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (en-GB) | 149.0 | Firefox Developer Edition (en-GB) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (en-US) | 149.0 | Firefox Developer Edition (en-US) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (eo) | 149.0 | Firefox Developer Edition (eo) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (es-AR) | 149.0 | Firefox Developer Edition (es-AR) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (es-CL) | 149.0 | Firefox Developer Edition (es-CL) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (es-ES) | 149.0 | Firefox Developer Edition (es-ES) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (es-MX) | 149.0 | Firefox Developer Edition (es-MX) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (et) | 149.0 | Firefox Developer Edition (et) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (eu) | 149.0 | Firefox Developer Edition (eu) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (fa) | 149.0 | Firefox Developer Edition (fa) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ff) | 149.0 | Firefox Developer Edition (ff) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (fi) | 149.0 | Firefox Developer Edition (fi) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (fr) | 149.0 | Firefox Developer Edition (fr) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (fur) | 149.0 | Firefox Developer Edition (fur) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (fy-NL) | 149.0 | Firefox Developer Edition (fy-NL) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ga-IE) | 149.0 | Firefox Developer Edition (ga-IE) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (gd) | 149.0 | Firefox Developer Edition (gd) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (gl) | 149.0 | Firefox Developer Edition (gl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (gn) | 149.0 | Firefox Developer Edition (gn) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (gu-IN) | 149.0 | Firefox Developer Edition (gu-IN) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (he) | 149.0 | Firefox Developer Edition (he) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (hi-IN) | 149.0 | Firefox Developer Edition (hi-IN) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (hr) | 149.0 | Firefox Developer Edition (hr) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (hsb) | 149.0 | Firefox Developer Edition (hsb) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (hu) | 149.0 | Firefox Developer Edition (hu) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (hy-AM) | 149.0 | Firefox Developer Edition (hy-AM) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ia) | 149.0 | Firefox Developer Edition (ia) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (id) | 149.0 | Firefox Developer Edition (id) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (is) | 149.0 | Firefox Developer Edition (is) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (it) | 149.0 | Firefox Developer Edition (it) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ja) | 149.0 | Firefox Developer Edition (ja) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ka) | 149.0 | Firefox Developer Edition (ka) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (kab) | 149.0 | Firefox Developer Edition (kab) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (kk) | 149.0 | Firefox Developer Edition (kk) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (km) | 149.0 | Firefox Developer Edition (km) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (kn) | 149.0 | Firefox Developer Edition (kn) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ko) | 149.0 | Firefox Developer Edition (ko) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (lij) | 149.0 | Firefox Developer Edition (lij) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (lt) | 149.0 | Firefox Developer Edition (lt) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (lv) | 149.0 | Firefox Developer Edition (lv) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (mk) | 149.0 | Firefox Developer Edition (mk) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (mr) | 149.0 | Firefox Developer Edition (mr) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ms) | 149.0 | Firefox Developer Edition (ms) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (my) | 149.0 | Firefox Developer Edition (my) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (nb-NO) | 149.0 | Firefox Developer Edition (nb-NO) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ne-NP) | 149.0 | Firefox Developer Edition (ne-NP) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (nl) | 149.0 | Firefox Developer Edition (nl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (nn-NO) | 149.0 | Firefox Developer Edition (nn-NO) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (oc) | 149.0 | Firefox Developer Edition (oc) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (pa-IN) | 149.0 | Firefox Developer Edition (pa-IN) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (pl) | 149.0 | Firefox Developer Edition (pl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (pt-BR) | 149.0 | Firefox Developer Edition (pt-BR) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (pt-PT) | 149.0 | Firefox Developer Edition (pt-PT) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (rm) | 149.0 | Firefox Developer Edition (rm) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ro) | 149.0 | Firefox Developer Edition (ro) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ru) | 149.0 | Firefox Developer Edition (ru) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sc) | 149.0 | Firefox Developer Edition (sc) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sco) | 149.0 | Firefox Developer Edition (sco) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (si) | 149.0 | Firefox Developer Edition (si) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sk) | 149.0 | Firefox Developer Edition (sk) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sl) | 149.0 | Firefox Developer Edition (sl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (son) | 149.0 | Firefox Developer Edition (son) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sq) | 149.0 | Firefox Developer Edition (sq) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sr) | 149.0 | Firefox Developer Edition (sr) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (sv-SE) | 149.0 | Firefox Developer Edition (sv-SE) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (szl) | 149.0 | Firefox Developer Edition (szl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ta) | 149.0 | Firefox Developer Edition (ta) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (te) | 149.0 | Firefox Developer Edition (te) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (tg) | 149.0 | Firefox Developer Edition (tg) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (th) | 149.0 | Firefox Developer Edition (th) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (tl) | 149.0 | Firefox Developer Edition (tl) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (tr) | 149.0 | Firefox Developer Edition (tr) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (trs) | 149.0 | Firefox Developer Edition (trs) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (uk) | 149.0 | Firefox Developer Edition (uk) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (ur) | 149.0 | Firefox Developer Edition (ur) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (uz) | 149.0 | Firefox Developer Edition (uz) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (vi) | 149.0 | Firefox Developer Edition (vi) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (xh) | 149.0 | Firefox Developer Edition (xh) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (zh-CN) | 149.0 | Firefox Developer Edition (zh-CN) 149.0 | Mar 13, 2026 |
| Firefox Developer Edition (zh-TW) | 149.0 | Firefox Developer Edition (zh-TW) 149.0 | Mar 13, 2026 |
| Mozilla Firefox (ach) | 149.0 | Mozilla Firefox (ach) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (af) | 149.0 | Mozilla Firefox (af) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (an) | 149.0 | Mozilla Firefox (an) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ar) | 149.0 | Mozilla Firefox (ar) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ast) | 149.0 | Mozilla Firefox (ast) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (az) | 149.0 | Mozilla Firefox (az) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (be) | 149.0 | Mozilla Firefox (be) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (bg) | 149.0 | Mozilla Firefox (bg) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (bn) | 149.0 | Mozilla Firefox (bn) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (br) | 149.0 | Mozilla Firefox (br) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (bs) | 149.0 | Mozilla Firefox (bs) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ca) | 149.0 | Mozilla Firefox (ca) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ca-valencia) | 149.0 | Mozilla Firefox (ca-valencia) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (cak) | 149.0 | Mozilla Firefox (cak) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (cs) | 149.0 | Mozilla Firefox (cs) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (cy) | 149.0 | Mozilla Firefox (cy) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (da) | 149.0 | Mozilla Firefox (da) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (de) | 149.0 | Mozilla Firefox (de) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (dsb) | 149.0 | Mozilla Firefox (dsb) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (el) | 149.0 | Mozilla Firefox (el) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (en-CA) | 149.0 | Mozilla Firefox (en-CA) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (en-GB) | 149.0 | Mozilla Firefox (en-GB) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (en-US) | 149.0 | Mozilla Firefox (en-US) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (eo) | 149.0 | Mozilla Firefox (eo) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (es-AR) | 149.0 | Mozilla Firefox (es-AR) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (es-CL) | 149.0 | Mozilla Firefox (es-CL) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (es-ES) | 149.0 | Mozilla Firefox (es-ES) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (es-MX) | 149.0 | Mozilla Firefox (es-MX) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (et) | 149.0 | Mozilla Firefox (et) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (eu) | 149.0 | Mozilla Firefox (eu) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (fa) | 149.0 | Mozilla Firefox (fa) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ff) | 149.0 | Mozilla Firefox (ff) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (fi) | 149.0 | Mozilla Firefox (fi) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (fr) | 149.0 | Mozilla Firefox (fr) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (fur) | 149.0 | Mozilla Firefox (fur) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (fy-NL) | 149.0 | Mozilla Firefox (fy-NL) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ga-IE) | 149.0 | Mozilla Firefox (ga-IE) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (gd) | 149.0 | Mozilla Firefox (gd) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (gl) | 149.0 | Mozilla Firefox (gl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (gn) | 149.0 | Mozilla Firefox (gn) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (gu-IN) | 149.0 | Mozilla Firefox (gu-IN) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (he) | 149.0 | Mozilla Firefox (he) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (hi-IN) | 149.0 | Mozilla Firefox (hi-IN) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (hr) | 149.0 | Mozilla Firefox (hr) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (hsb) | 149.0 | Mozilla Firefox (hsb) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (hu) | 149.0 | Mozilla Firefox (hu) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (hy-AM) | 149.0 | Mozilla Firefox (hy-AM) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ia) | 149.0 | Mozilla Firefox (ia) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (id) | 149.0 | Mozilla Firefox (id) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (is) | 149.0 | Mozilla Firefox (is) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (it) | 149.0 | Mozilla Firefox (it) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ja) | 149.0 | Mozilla Firefox (ja) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ka) | 149.0 | Mozilla Firefox (ka) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (kab) | 149.0 | Mozilla Firefox (kab) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (kk) | 149.0 | Mozilla Firefox (kk) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (km) | 149.0 | Mozilla Firefox (km) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (kn) | 149.0 | Mozilla Firefox (kn) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ko) | 149.0 | Mozilla Firefox (ko) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (lij) | 149.0 | Mozilla Firefox (lij) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (lt) | 149.0 | Mozilla Firefox (lt) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (lv) | 149.0 | Mozilla Firefox (lv) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (mk) | 149.0 | Mozilla Firefox (mk) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (mr) | 149.0 | Mozilla Firefox (mr) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ms) | 149.0 | Mozilla Firefox (ms) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (my) | 149.0 | Mozilla Firefox (my) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (nb-NO) | 149.0 | Mozilla Firefox (nb-NO) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ne-NP) | 149.0 | Mozilla Firefox (ne-NP) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (nl) | 149.0 | Mozilla Firefox (nl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (nn-NO) | 149.0 | Mozilla Firefox (nn-NO) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (oc) | 149.0 | Mozilla Firefox (oc) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (pa-IN) | 149.0 | Mozilla Firefox (pa-IN) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (pl) | 149.0 | Mozilla Firefox (pl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (pt-BR) | 149.0 | Mozilla Firefox (pt-BR) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (pt-PT) | 149.0 | Mozilla Firefox (pt-PT) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (rm) | 149.0 | Mozilla Firefox (rm) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ro) | 149.0 | Mozilla Firefox (ro) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ru) | 149.0 | Mozilla Firefox (ru) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sc) | 149.0 | Mozilla Firefox (sc) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sco) | 149.0 | Mozilla Firefox (sco) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (si) | 149.0 | Mozilla Firefox (si) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sk) | 149.0 | Mozilla Firefox (sk) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sl) | 149.0 | Mozilla Firefox (sl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (son) | 149.0 | Mozilla Firefox (son) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sq) | 149.0 | Mozilla Firefox (sq) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sr) | 149.0 | Mozilla Firefox (sr) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (sv-SE) | 149.0 | Mozilla Firefox (sv-SE) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (szl) | 149.0 | Mozilla Firefox (szl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ta) | 149.0 | Mozilla Firefox (ta) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (te) | 149.0 | Mozilla Firefox (te) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (tg) | 149.0 | Mozilla Firefox (tg) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (th) | 149.0 | Mozilla Firefox (th) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (tl) | 149.0 | Mozilla Firefox (tl) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (tr) | 149.0 | Mozilla Firefox (tr) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (trs) | 149.0 | Mozilla Firefox (trs) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (uk) | 149.0 | Mozilla Firefox (uk) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (ur) | 149.0 | Mozilla Firefox (ur) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (uz) | 149.0 | Mozilla Firefox (uz) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (vi) | 149.0 | Mozilla Firefox (vi) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (xh) | 149.0 | Mozilla Firefox (xh) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (zh-CN) | 149.0 | Mozilla Firefox (zh-CN) 149.0 | Mar 24, 2026 |
| Mozilla Firefox (zh-TW) | 149.0 | Mozilla Firefox (zh-TW) 149.0 | Mar 24, 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 | 150.0.2 | Mozilla Firefox 150.0.2 | May 6, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.