# Firefox Developer Edition (en-US) security updates The latest version of Firefox Developer Edition (en-US) is 160.0, released October 30, 2026. Patch Radar has 27 security fixes for Firefox Developer Edition (en-US), closing 824 CVEs, 1 of which is being exploited. The newest security fix is Firefox Developer Edition (en-US) 160.0, released October 30, 2026. - Web page: https://patchblox.com/security/product/windows-app/firefox-developer-edition-en-us - Platform: Windows apps - Vendor: Mozilla - Latest version: 160.0 (Oct 30, 2026) - Supported: yes ## Security fixes, newest first | Fix | Released | Fixed in | Priority | CVEs | Exploited | |---|---|---|---|---:|---:| | [Firefox Developer Edition (en-US) 160.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-160.0.md) | Oct 30, 2026 | 160.0 | Urgent | 76 | 0 | | [Firefox Developer Edition (en-US) 156.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-156.0.md) | Sep 2, 2026 | 156.0 | Urgent | 259 | 0 | | [Firefox Developer Edition (en-US) 151.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-151.0.md) | May 13, 2026 | 151.0 | Urgent | 88 | 0 | | [Firefox Developer Edition (en-US) 149.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-149.0.md) | Mar 13, 2026 | 149.0 | Urgent | 47 | 0 | | [Firefox Developer Edition (en-US) 148.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-148.0.md) | Feb 9, 2026 | 148.0 | Urgent | 54 | 0 | | [Firefox Developer Edition (en-US) 147.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-147.0.md) | Dec 22, 2025 | 147.0 | Urgent | 18 | 0 | | [Firefox Developer Edition (en-US) 146.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-146.0.md) | Nov 28, 2025 | 146.0 | Urgent | 13 | 0 | | [Firefox Developer Edition (en-US) 145.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-145.0.md) | Oct 31, 2025 | 145.0 | Urgent | 17 | 0 | | [Firefox Developer Edition (en-US) 144.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-144.0.md) | Oct 3, 2025 | 144.0 | Urgent | 13 | 0 | | [Firefox Developer Edition (en-US) 143.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-143.0.md) | Sep 5, 2025 | 143.0 | High | 10 | 0 | | [Firefox Developer Edition (en-US) 142.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-142.0.md) | Aug 8, 2025 | 142.0 | Urgent | 9 | 0 | | [Firefox Developer Edition (en-US) 141.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-141.0.md) | Jul 11, 2025 | 141.0 | Urgent | 24 | 0 | | [Firefox Developer Edition (en-US) 140.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-140.0.md) | Jun 13, 2025 | 140.0 | Urgent | 12 | 0 | | [Firefox Developer Edition (en-US) 139.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-139.0.md) | May 18, 2025 | 139.0 | High | 11 | 0 | | [Firefox Developer Edition (en-US) 138.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-138.0.md) | Apr 18, 2025 | 138.0 | High | 12 | 0 | | [Firefox Developer Edition (en-US) 137.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-137.0.md) | Mar 12, 2025 | 137.0 | Urgent | 8 | 0 | | [Firefox Developer Edition (en-US) 136.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-136.0.md) | Feb 21, 2025 | 136.0 | Urgent | 14 | 0 | | [Firefox Developer Edition (en-US) 135.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-135.0.md) | Jan 24, 2025 | 135.0 | High | 13 | 0 | | [Firefox Developer Edition (en-US) 134.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-134.0.md) | Dec 13, 2024 | 134.0 | High | 9 | 0 | | [Firefox Developer Edition (en-US) 133.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-133.0.md) | Nov 15, 2024 | 133.0 | Urgent | 16 | 0 | | [Firefox Developer Edition (en-US) 132.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-132.0.md) | Oct 18, 2024 | 132.0 | Patch now | 14 | 1 | | [Firefox Developer Edition (en-US) 131.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-131.0.md) | Sep 3, 2024 | 131.0 | High | 13 | 0 | | [Firefox Developer Edition (en-US) 130.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-130.0.md) | Aug 6, 2024 | 130.0 | High | 8 | 0 | | [Firefox Developer Edition (en-US) 129.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-129.0.md) | Jul 9, 2024 | 129.0 | High | 18 | 0 | | [Firefox Developer Edition (en-US) 128.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-128.0.md) | Jun 11, 2024 | 128.0 | Urgent | 16 | 0 | | [Firefox Developer Edition (en-US) 127.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-127.0.md) | May 14, 2024 | 127.0 | High | 15 | 0 | | [Firefox Developer Edition (en-US) 126.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.developeredition-126.0.md) | Apr 16, 2024 | 126.0 | High | 17 | 0 | --- Data as of 2026-11-11T13:47:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data 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.