Firefox 139 Web Browser Is Now Available for Download, Here’s What’s New

Posted by hanuca on May 26, 2025 10:48 PM CST
9to5linux.com; By Marius Nestor 		Mail this story
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Mozilla published today the final build of the Firefox 139 open-source web browser ahead of the official announcement on May 27th, 2025.

Mozilla Firefox 139 looks like a small update that only introduces support for full-page translations within Firefox extension pages, support for transparent PNG images when they’re pasted into Firefox, and improved upload performance of HTTP/3.

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