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.

17.0

Firefox for Android Release

November 19, 2012

Version 17.0, first offered to Release channel users on November 19, 2012

New

  • Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission (see blog post)

Fixed

  • 17.0.1: Font rendering issue in Firefox 17.0 (bug 814101)

  • 17.0.1: Reverted user agent change causing some website incompatibilities

  • 17.0.1: Leaving Private Browsing with Social API enabled should reset social components

  • Page scrolling on sites with fixed headers

  • Over twenty performance improvements, including fixes around the New Tab page

  • Various security fixes

Changed

Developer

  • SVG FillPaint and StrokePaint implemented

  • New Markup panel in the Page Inspector allows easy editing of the DOM

  • Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use

  • JavaScript Maps and Sets are now iterable

Developer Information

Web Platform

  • Sandbox attribute for iframes implemented, enabling increased security

  • Pointer lock doesn't work in web apps

unresolved

  • If you try to start Firefox using a locked profile, it will crash (see 573369)