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.


Firefox Beta

January 25, 2017

Version 52.0beta, first offered to Beta channel users on January 25, 2017


  • Send and open a tab from one device to another with Sync

  • Windows 8 touch screen support for multiprocess Firefox

  • Pages containing insecure password fields now display a warning directly within username and password fields.


  • Removed Battery Status API to reduce fingerprinting of users by trackers

  • Removed NPAPI support for plugins other than Flash. Silverlight, Java, Acrobat and the like are no longer supported.

  • Implemented the Strict Secure Cookies spec which forbids insecure (http:) sites from setting cookies with the "secure" attribute, and in some cases prevents an insecure site from setting a cookie with the same name as an existing "secure" cookie from the same base domain.

  • Improved experience for downloads:

    • Notification in the toolbar when a download fails
    • Quick access to five most recent downloads rather than three
    • Larger buttons for canceling and restarting
  • Improved text input with some third-party keyboard layouts on Windows, e.g., keyboard layouts which have chained dead keys, inputs two or more characters with a non-printable key or a dead key sequence, inputs a character even when a dead key sequence failed to compose a character.


  • Responsive Design Mode redesigned and enhanced with device selection, network throttling, and more

  • Screen sharing shows a preview and no longer requires a whitelisted domain

  • Enabled CSS Grid Layout

Developer Information