Mozilla Corporation’s free and open-source web browser, Mozilla Firefox gets a new stable release, Firefox version 38.0, which includes new features and fixes for known issues.

Firefox is a fast, full-featured Web browser, which includes pop-up blocking, tab-browsing, integrated Google search, simplified privacy controls, and many additional features.

Firefox v38 1


Made with a mission to put you first
We’ve always designed Firefox to protect and respect your private information. That’s why we’re proud to be voted the Most Trusted Internet Company for Privacy.

Works the way you do
How you use the Web is unique. Firefox lets you change it to match. Remove what you don’t use, keep what you do and put it just about anywhere you want.

Faster at what you do most
Firefox was named the ”speed king” in independent benchmark and performance tests against other browsers. Save time and do just about anything quicker than before

What’s new in Firefox 38.0:

  • New – New tab-based preferences
  • New – Ruby annotation support
  • New – Base for the next ESR release.
  • Changed – autocomplete=off is no longer supported for username/password fields
  • Changed – 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
  • Changed – RegExp.prototype.source now returns “(?:)” instead of the empty string for empty regular expressions
  • Changed – Improved page load times via speculative connection warmup
  • HTML5 – WebSocket now available in Web Workers
  • HTML5 – BroadcastChannel API implemented
  • HTML5 – Implemented srcset attribute and element for responsive images
  • HTML5 – Implemented DOM3 Events KeyboardEvent.code
  • HTML5 – Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • HTML5 – Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)
  • HTML5 – Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)
  • Developer – Optimized-out variables are now visible in Debugger UI
  • Developer – XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • Developer – WebRTC now has multistream and renegotiation support
  • Developer – copy command added to console
  • Various security fixes

Known Issues

  • unresolved – Responsive images do not update when the enclosing viewport changes

Download: Firefox 38.0 for Windows | 37.8 MB (Freeware)
Download: Firefox 38.0 for Linux | 44.9 MB
Download: Firefox 38.0 for MacOS | 71.2 MB


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