Firefox 109 officially launches, supporting Manifest V3 extensions

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Ngày cập nhật gần nhất: 1/11/2025

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Firefox 109 supports Manifest V3 extensions

Following the footsteps of Google and Microsoft with Chrome 109 and Microsoft Edge 109 hitting the market, Mozilla today officially unveils Firefox 109. The latest version of Firefox is now available on the Release channel, featuring support for Manifest V3 extensions, improved accessibility, security fixes, and various other enhancements.

Although Firefox will automatically update to the latest version 109, users can also manually update Firefox to the newest version by accessing Menu => Help => About Firefox. Alternatively, you can download the latest Firefox 109 here:

+ Download link for Firefox 109 64-bit
+ Download link for Firefox 109 32-bit

Firefox 109 supports Manifest V3 extensions

Additionally, while Manifest V3 has been implemented in Firefox 109, Mozilla currently has no plans to immediately stop supporting Manifest V2. This decision comes as Google and Microsoft have recently decided to extend support for Manifest V2, giving developers more time before transitioning to Manifest V3.

As per the release notes:

New features:

- Support for Manifest Version 3 (MV3) extensions is now activated by default (MV2 is still supported/activated). This major update also brings interesting changes to the user interface in the form of new extension buttons.
- Arbitrary Code Guard exploit protection is activated in multimedia player processes, enhancing security for Windows users.

Other changes:

- Starting from January 16th, Colorways will no longer be supported on Firefox. Users can still access saved and active Colorways from the Add-ons and themes menu option.
- On macOS, the Ctrl or Cmd + trackpad or mouse scroll combination is used for scrolling instead of zooming as before. This is to avoid accidental zooming and align with the behavior of other web browsers on macOS.
- The Recently Closed section on Firefox View has additional options allowing users to manually close/remove URL links from the list.
- Empty status notifications and graphical elements in Firefox View in Tab Pickup and Recently Closed sections are updated to enhance user experience.

Furthermore, using too many extensions or add-ons in Firefox can consume more RAM and computer resources. Therefore, you should consider enabling/disabling extensions in the Firefox browser for optimal performance.

In addition to the information about the Firefox 109 update, don't forget to visit Mytour daily to stay updated on other new technology news.

Frequently Asked Questions

What new features are included in Firefox 109 for better performance and security?

Firefox 109 introduces several new features, including support for Manifest V3 extensions, improved accessibility, and security enhancements such as Arbitrary Code Guard for multimedia processes. This version also brings UI changes with new extension buttons, enhancing user experience and security.

How can I manually update my Firefox browser to the latest version 109?

Yes, you can manually update your Firefox browser to version 109. Simply go to the Menu, select Help, and then click on About Firefox. This will check for updates and install the latest version automatically.

Will Mozilla continue to support Manifest V2 extensions in Firefox after version 109?

Yes, Mozilla will continue to support Manifest V2 extensions in Firefox 109. This decision aligns with recent actions by Google and Microsoft, allowing developers more time to transition to Manifest V3 without immediate disruptions.

What should I do if I experience performance issues with multiple extensions in Firefox?

If you encounter performance issues in Firefox due to multiple extensions, consider disabling or enabling specific add-ons. Managing your extensions can significantly reduce RAM usage and improve overall browser performance.

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