Firefox 17.0 Final Released, More Secure and Social

Firefox 17.0 Final is now available for download from Mozilla download center. Firefox 17.0 includes the first revision of the Social API that support for Facebook Messenger. This version also includes the Click-To-Play plugin that prevent vulnerable plugin versions from running without the user's permission.

In addition, this version improves display of location bar results, and includes a new feature for developers, an HTML tree editor. Finally, Firefox 17.0 completely drop support for OS X 10.5 (Leopard).

Download Firefox 17.0 Final:
The links in this section correspond to files available for this download. Download the files appropriate for you:

Firefox 17.0 Final running on Windows 8

What's new in Firefox 17.0 Final?
Firefox 17.0 Final has the following changes:

New:
  • First revision of the Social API and support for Facebook Messenger.
  • Click-to-play blocklisting implemented to prevent vulnerable plugin versions from running without the user's permission.

Changed:
  • Updated Awesome Bar experience with larger icons.
  • Mac OS X 10.5 is no longer supported.

Developer:
  • JavaScript Maps and Sets are now iterable.
  • SVG FillPaint and StrokePaint implemented.
  • Improvements that make the Web Console, Debugger and Developer Toolbar faster and easier to use.
  • New Markup panel in the Page Inspector allows easy editing of the DOM.

HTML5:
  • Sandbox attribute for iframes implemented, enabling increased security.

Fixed:
  • Over twenty performance improvements, including fixes around the New Tab page.
  • Pointer lock doesn't work in web apps (769150).
  • Page scrolling on sites with fixed headers (780345).

Security fixed:
  • MFSA 2012-106 Use-after-free, buffer overflow, and memory corruption issues found using Address Sanitizer. [Critical]
  • MFSA 2012-105 Use-after-free and buffer overflow issues found using Address Sanitizer. [Critical]
  • MFSA 2012-104 CSS and HTML injection through Style Inspector. [Critical]
  • MFSA 2012-103 Frames can shadow top.location. [High]
  • MFSA 2012-102 Script entered into Developer Toolbar runs with chrome privileges. [High]
  • MFSA 2012-101 Improper character decoding in HZ-GB-2312 charset. [High]
  • MFSA 2012-100 Improper security filtering for cross-origin wrappers. [High]
  • MFSA 2012-99 XrayWrappers exposes chrome-only properties when not in chrome compartment. [High]
  • MFSA 2012-98 Firefox installer DLL hijacking. [High]
  • MFSA 2012-97 XMLHttpRequest inherits incorrect principal within sandbox. [High]
  • MFSA 2012-96 Memory corruption in str_unescape. [High]
  • MFSA 2012-95 Javascript: URLs run in privileged context on New Tab page. [Moderate]
  • MFSA 2012-94 Crash when combining SVG text on path with CSS. [Critical]
  • MFSA 2012-93 evalInSanbox location context incorrectly applied. [High]
  • MFSA 2012-92 Buffer overflow while rendering GIF images. [Critical]
  • MFSA 2012-91 Miscellaneous memory safety hazards (rv:17.0/ rv:10.0.11) [Critical]

How to enable Facebook Messenger in Firefox 17?
You can enable Facebook Messenger in one of two ways:
  • Navigating to the Facebook Messenger for Firefox page with Firefox 17 and clicking the Turn On button
  • Go to the Firefox about:config page and set the value of social.enabled to 'true'.


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