Firefox 140 ESR Web Browser Is Now Available for Download, This Is What’s New

Posted by hanuca on Jun 23, 2025 11:36 AM CST
9to5linux.com; By Marius Nestor
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Mozilla published today the final build of the Firefox 140 ESR open-source web browser ahead of the official announcement on June 24th, 2025.

Highlights of Firefox 140 include 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.

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