Firefox Developer Edition (en-US) 134.0
Firefox Developer Edition (en-US) 134.0, released December 13, 2024, fixes 9 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Superseded.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 9 CVEs
Applies to
| Product | Version |
|---|---|
| Firefox Developer Edition (en-US) | 134.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| High | CVE-2025-0242 | Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 | 8.8 | 0.1472 | None reported |
| High | CVE-2025-0247 | Memory safety bugs fixed in Firefox 134 and Thunderbird 134 | 9.8 | 0.1061 | None reported |
| High | CVE-2025-0241 | Memory corruption when using JavaScript Text Segmentation | 7.7 | 0.0073 | None reported |
| Routine | CVE-2025-0244 | Address bar spoofing using an invalid protocol scheme on Firefox for Android | 5.3 | 0.0739 | None reported |
| Routine | CVE-2025-0238 | Use-after-free when breaking lines in text | 6.5 | 0.0079 | None reported |
| Routine | CVE-2025-0240 | Compartment mismatch when parsing JavaScript JSON module | 6.5 | 0.0067 | None reported |
| Routine | CVE-2025-0237 | WebChannel APIs susceptible to confused deputy attack | 6.8 | 0.0060 | None reported |
| Routine | CVE-2025-0245 | Lock screen setting bypass in Firefox Focus for Android | 3.3 | 0.0029 | None reported |
| Routine | CVE-2025-0239 | Alt-Svc ALPN validation failure when redirected | 5.4 | 0.0023 | None reported |
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.