Mozilla Firefox 38 Released [How-to-Upgrade]

May 13, 2015 — 1 Comment

Firefox 38

A new stable release of Mozilla Firefox web browser has been release yesterday with new features include tab-based preferences, and responsive image support.

Here’s the full list of changes in Firefox 38:

  • New tab-based preferences
  • Ruby annotation support
  • Base for the next ESR release.
  • 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
  • WebSocket now available in Web Workers
  • BroadcastChannel API implemented
  • Implemented srcset attribute and element for responsive images
  • Implemented DOM3 Events KeyboardEvent.code
  • Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube
  • Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only)
  • Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only)
  • Optimized-out variables are now visible in Debugger UI
  • XMLHttpRequest logs in the web console are now visually labelled and can be filtered separately from regular network requests
  • WebRTC now has multistream and renegotiation support
  • copy command added to console
  • Various security fixes

via: firefox 38 release note.

How to Upgrade to Firefox 38:

The new release has been made into the Ubuntu security repository half an hour ago. Ubuntu 15.04, Ubuntu 14.10, Ubuntu 14.04, Ubuntu 12.04, Linux Mint 13/17, eOS Freya/Luna users can easily upgrade to Firefox 38 via Software Updater or Updater Manager:


I'm a freelance blogger who started using Ubuntu 5+ years ago and wishes to share my experiences and some useful tips with Ubuntu beginners and lovers. Please notify me if you find any typo/grammar/language mistakes. English is not my native language. Contact me on Google Plus or email to

One response to Mozilla Firefox 38 Released [How-to-Upgrade]

  1. Hoover Campoverde May 14, 2015 at 3:35 pm

    Thank you Ji m. Always your help is so neccesary. Now I have my fave web browser (Firefox) updated using Ubuntu 14.04.2LTS amd64.

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