Manifest V2

Winsage
October 20, 2025
Mozilla will continue to provide comprehensive support for Firefox on Windows 10, including security updates and new features. Approximately 36.5% of Firefox users are on Windows 10, and Mozilla's commitment ensures they will receive full feature parity with Windows 11. Users can expect rapid vulnerability patching and ongoing access to new functionalities. Mozilla also recommends security measures for Windows 10 users, such as enrolling in Microsoft's Extended Security Updates program and using Firefox Sync for data backups. Additionally, Mozilla has extended support for Firefox ESR 115 on older operating systems until March 2026, distinguishing itself as the last major browser offering secure browsing on deprecated systems. Mozilla will also support Manifest V2 browser extensions until February 2025.
Winsage
September 5, 2025
Mozilla has extended support for Firefox ESR 115 for users on aging operating systems until March 2026, specifically for Windows 7, Windows 8, Windows 8.1, and macOS versions 10.12 through 10.14. This extension allows these users to continue receiving essential security patches for an additional six months. Firefox ESR 115, released in July 2023, is the final version compatible with these legacy systems. Mozilla emphasizes its commitment to providing security updates for deprecated operating systems, making Firefox ESR one of the few mainstream browsers still offering secure browsing on these platforms, as Google Chrome and Microsoft Edge have ceased support.
Winsage
August 17, 2024
Google Chrome is transitioning to Manifest V3, impacting browser extensions, particularly uBlock Origin, which relies on Manifest V2. Users may consider switching to alternative browsers that support Manifest V2. Mozilla's Firefox supports Manifest V2 and allows access to Chrome extensions, while planning to adopt Manifest V3 in the future. Vivaldi will support Manifest V2 until its removal from Chromium in June 2025, but concerns exist about accessing these extensions via the Chrome Web Store. Microsoft Edge allows installation of Manifest V2 extensions but is no longer accepting new ones, creating uncertainty about long-term support. Brave Browser has limited support for Manifest V2 extensions like uBlock Origin, with potential support only until June 2025, raising concerns for users reliant on various plugins.
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