Firefox 137 lastly will get tab teams, tackle bar enhancements, and extra

Yesterday, Mozilla launched Firefox model 137.0 for Home windows, macOS, and Linux, introducing new options and a few safety fixes.

The headlining function is the brand new built-in capacity to prepare and save tab teams. Previous to this, you had to make use of a third-party extension like Easy Tab Teams or Panorama View. Now, Firefox has caught up with Chromium-based browsers with native tab grouping.

Moreover, the Firefox tackle bar now gives enhanced search features, and the builders have once more patched quite a lot of safety flaws. Firefox ESR and Tor Browser additionally received safety updates.

Mozilla plans to launch Firefox 138 on April 29, 2025.

What’s new in Firefox 137?

Following the introduction of vertical tabs in Firefox 136, Firefox 137 now gives the choice of organizing tabs into teams. You’ll be able to assign a reputation and colour to every tab group, and you’ll shut tab teams to be reopened once more later. Each vertical tabs and tab teams have been among the many most requested options for Firefox, particularly as they’ve been accessible in different browsers like Chrome and Vivaldi for a while.

Mozilla’s builders have given the tackle bar a recent makeover, too. Particularly, they’ve revised the search features. A standardized search button within the tackle bar now simplifies switching between search engines like google and search modes. Firefox acknowledges whether or not you’re presently on a web page with a search perform and gives to make use of it and combine it into Firefox. The tackle bar can now even be used as a calculator, just like the Google search bar.

Not all new options are instantly accessible to all customers. A few of them could solely be rolled out regularly over the approaching weeks.

Safety updates in Firefox 137

Mozilla’s 2025-20 Safety Advisory report reveals not less than eight fastened vulnerabilities in Firefox 137. Mozilla solely provides a excessive threat score for one of many entries amongst particular person vulnerabilities reported by exterior researchers. For instance, CVE-2025-3028 can result in a use-after-free (UAF) vulnerability if JavaScript code runs whereas a web page is being remodeled by the XSLT processor.

There are additionally two summarized entries on internally found vulnerabilities, which even have excessive threat scores. Exploitation of those vulnerabilities can result in reminiscence errors that may probably be exploited to inject and execute arbitrary code. Mozilla doesn’t present any data on the precise variety of vulnerabilities lined right here.

Updates for Firefox ESR and Tor Browser

Mozilla has up to date its long-term variations Firefox ESR 128 and ESR 115 to patch vulnerabilities. No less than three vulnerabilities have been closed in Firefox ESR 128.9.0 and precisely one in Firefox ESR 115.22.0, specifically the UAF vulnerability CVE-2025-3028 talked about above.

The up to date Tor Browser 14.0.9 is predicated on Firefox ESR 128.9.0. An replace for Tor Browser 13.5 to model 13.5.15 can also be accessible when you’re working Home windows 7 or 8.1 or macOS 10.13 or 10.14. This could make it clear that the Tor challenge is following Mozilla’s instance and can proceed to assist the previous working methods not less than till September.

Additional studying: Causes to change from Chrome to Firefox