Firefox Developer Edition (en-US) 135.0
Firefox Developer Edition (en-US) 135.0, released January 24, 2025, fixes 13 CVEs in Firefox Developer Edition (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Firefox Developer Edition (en-US) is 156.0, which also fixes every one of these CVEs.
Superseded. The latest Firefox Developer Edition (en-US) is 156.0, which also fixes every CVE on this page. Install that instead.
Priority of the 13 CVEs
Applies to
| Product | Version |
|---|---|
| Firefox Developer Edition (en-US) | 135.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-1009 | Use-after-free in XSLT | 9.8 | 0.0121 | None reported |
| High | CVE-2025-1011 | A bug in WebAssembly code generation could result in a crash | 8.8 | 0.0063 | None reported |
| High | CVE-2025-1016 | Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7 | 9.8 | 0.0059 | None reported |
| High | CVE-2025-1017 | Memory safety bugs fixed in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7 | 9.8 | 0.0058 | None reported |
| High | CVE-2025-1937 | Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 | 8.8 | 0.0056 | None reported |
| High | CVE-2025-1020 | Memory safety bugs fixed in Firefox 135 and Thunderbird 135 | 9.8 | 0.0054 | None reported |
| High | CVE-2025-1010 | Use-after-free in Custom Highlight | 8.8 | 0.0046 | None reported |
| High | CVE-2025-1012 | Use-after-free during concurrent delazification | 8.8 | 0.0045 | None reported |
| High | CVE-2025-1014 | Certificate length was not properly checked | 8.8 | 0.0039 | None reported |
| High | CVE-2025-1938 | Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8 | 8.8 | 0.0034 | None reported |
| High | CVE-2025-1013 | Potential opening of private browsing tabs in normal browsing windows | 8.8 | 0.0033 | None reported |
| Routine | CVE-2025-1018 | Fullscreen notification is not displayed when fullscreen is re-requested | 5.3 | 0.0042 | None reported |
| Routine | CVE-2025-1019 | Fullscreen notification not properly displayed | 4.3 | 0.0036 | None reported |
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