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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 Extended Support Release ESR

March 7, 2017

Version 52.0esr, first offered to ESR channel users on March 7, 2017


  • Service workers and push notifications disabled

  • WebAssembly disabled

  • Non-flash plugins re-enabled (disabled in the regular 52.0 release)