Mozilla published today the final build of the Firefox 137 open-source web browser for all supported platforms ahead of the April 1st, 2025, official release date, so it’s time to take a look at the new features and changes.

Highlights of Firefox 137 include HEVC playback support on Linux systems, the ability to identify all links in PDF files and turn them into hyperlinks, the ability to sign PDF documents without leaving Firefox, and support for using the address bar as a calculator.

“Simply type an arithmetic expression and view the result in the address bar drop-down. Clicking on this result will copy it to your clipboard,” said Mozilla. The company also stated that not all users will get this feature as it is being rolled out progressively, and the same goes for the feature to sign PDFs.

Another new feature that is being rolled out progressively starting with this release is the long anticipated tab grouping. Users will be able to group tabs by either selecting the tabs they want to group and right-clicking on any of them to group the selected tabs or by dragging a tab over another. Tab groups can be named and colored.

Firefox 137: New Features

Tab Grouping

Creating tab groups is easy

Firefox 137 brings Tab Groups to users on the stable release channel (although the feature has been available to test in stable builds prior to today that required users to opt-in by manually enabling a hidden configuration value).

Tab Groups in Firefox function more or less the same way tab grouping features in other desktop web browsers do: right-click on a tab to create a tab group containing it, or drag a tab on to another tab to merge them into a new group (and drag other tabs in thereafter).

Users can give groups a custom name and assign a colours, collapse and expand as needed, and save them so groups of tabs can be reopened again later.

“Stay productive and organized with less effort by grouping related tabs together. One simple way to create a group is to drag a tab onto another, pause until you see a highlight, then drop to create the group,” say Mozilla of the feature.

Tab Groups in Firefox 137 is initially part of a “progressive rollout”, meaning the feature is enabled remotely by Mozilla, so not all users will have access to it right away after upgrading to the new version.

Tab hoarders and those looking to bring order to the chaos of too many open tabs should keep an eye out for it.

Address Bar Revamp

The ‘Scotch Bonnet’ search chip has landed in stable builds

A major refresh to the Address Bar debuts in Firefox 136, which Mozilla say offers “new ways to search for things new, previously viewed, and more”.

A new “Unified Search Button” sits at the start of the address bar, similar to the one already present in the Firefox for Android build.

The button makes it a tad easier to to switch between searching with a search engine, doing a site-specific search (if any are added, e.g., Wikipedia), as well browser features like bookmarks, history or open tabs – all previously possibly, now said to offer ‘more ease’.

On a site that can be added as a custom search engine?

Additionally, the new address bar in Firefox 137 supports search term persistence, hooks up ‘search keywords’ (e.g., @bookmarks, @history, etc), and surfaces site specific search mode when initiating a new address bar on a website with search capabilities, as above.

Users will also notice that some secondary action buttons to common browser features now appear in the search results shade, and the ability to use the Firefox address bar as a calculator (clicking on a result in this mode copies it to the clipboard).

HEVC Linux Playback

Firefox 137 adds support for HEVC playback on Linux. The browser is now able to natively decode and display videos encoded in HEVC (High Efficiency Video Coding, and also known as H.265) on Linux – on systems with hardware capable of doing so.

HEVC offers better compression efficiency than H.264, meaning higher quality video at lower bitrates and file sizes and is becoming increasingly common on the web, especially with the shift to 4K content.

Now, Linux users with graphics hardware supporting video acceleration through Mesa VA Gallium3D (like AMD Radeon cards), Intel VA-API, or NVIDIA’s VA-API compatibility layer, can watch HEVC content in Firefox with hardware acceleration, thereby reducing CPU usage.

Other Changes

Beyond the headline buffs above, Firefox 137 also adds:

• Auto-converts all links in PDFs into hyperlinks

• Sign PDFs in Firefox and save signatures to re-use

• Inspector Fonts panel display font metadata, e.g., version, designer, etc

Silent installation

Silent installation

Silent installation

Arabic

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https://www.mediafire.com/file/i10kmvl42o8dsxh/Mozilla.Firefox.137.0.ar.AIO.Install.Silent.rar/file

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English

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French

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Mozilla Firefox 115.0.3 (Last version support Windows 7)

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English
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Edited yesterday at 01:14 AM1 day by T3rM1nat0Rr3

Changes in Mozilla Firefox 136.0.1:

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Changes in Mozilla Firefox 137.0 – Final: