See what’s new in Firefox!
Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.
54.0beta
Firefox Beta
April 21, 2017
Version 54.0beta, first offered to Beta channel users on April 21, 2017
New
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Clearer and more detailed information for download items in the download panel
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Added Burmese (my) locale
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Bookmarks created on mobile devices are now shown in "Mobile Bookmarks” folder in the drop down list from the toolbar and Bookmarks option in the menu bar in Desktop Firefox
Developer
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Changes for web developers
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Create your own custom devices in Responsive Device Mode