Firefox 140 Enters Beta Testing as the Next ESR (Extended Support Release) Series

Posted by hanuca on May 27, 2025 6:26 PM CST
9to5linux.com; By Marius Nestor
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Now that Firefox 139 has been promoted to the stable channel today, Mozilla has promoted the next major release, Firefox 140, to the beta channel for public testing, so it’s time to take a look at the changes.

Firefox 140 promises a new Unload Tab feature that lets you unload tabs by right-clicking on a tab (or multiple selected tabs to reduce Firefox’s memory and CPU usage, support for adding custom search engines in Search settings, and support for keeping more or fewer pinned vertical tabs in view. For Android users, it adds a “Select All” option for bookmarks.

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