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Firefox for Android
Release Notes

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.

38.0 Firefox for Android Release

May 12, 2015

Version 38.0, first offered to Release channel users on May 12, 2015

We'd also like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!


  • Improved user interfaces:

    • New "Welcome Screen"
    • Reader View controls (on Tablets and Phones)
    • "Synced Tabs" panel new layout (on Tablets)
    • "Add to Firefox" feature (from outside Firefox)
  • Ruby annotation support

  • Support for the Android L theme

  • Send a tab to another connected device with the 'Send to device' option in the "share" menu

  • Add a website to your Reading List with the "Add to Reading List" button in the overflow menu

  • Locale added: Azerbaijani (az)



  • autocomplete=off is no longer supported for username/password fields

  • URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec

  • RegExp.prototype.source now returns "(?:)" instead of the empty string for empty regular expressions

  • Improved page load times via speculative connection warmup


Web Platform

  • WebSocket now available in Web Workers

  • Implemented srcset attribute and <picture> element for responsive images

  • Implemented DOM3 Events KeyboardEvent.code


  • Responsive images do not update when the enclosing viewport changes

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