Firefox 30 is the new stable version of the web browser that is currently available on Mozilla's FTP server only. The organization pushes new releases to the ftp server first before they are made available on the website and via the browser's automatic updating mechanism.
Some third-party websites may also host the new release early, but unless you want to use a specific feature right away or patch security issues, it is usually the best idea to wait until the release is announced officially by Mozilla.
To check which version of Firefox you are using type about:support into the browser's address bar. Locate the version of the browser under application basics.
Read our Firefox download guide for all information you could possibly need to download the browser to your system.
Firefox 30 is a minor update in terms of functionality that has been added or changed in the browser. This is in stark contrast to Firefox 29 which introduced the Australis interface to the browser.
Lets find out what is new and changed in Firefox 30, shall we?
Firefox 30 Changes
Most plugins are not activated by default anymore
Mozilla made the decision to block the majority of plugins in Firefox starting with version 30. Blocking does not mean that you won't have access to those anymore, but that they need to be enabled by the user before they can be used on the web.
The only exception to that rule is a list of plugins that Mozilla has whitelisted for now. You can check the full list of whitelisted plugins on this page.
It includes Adobe Flash and several other popular plugins such as Unity, Skype and several McAfee plugins. What you won't find on the list are Java, Google Update, Silverlight or Microsoft Office.
Support for GStreamer 1.0
Probably the biggest feature addition of Firefox 30 is support for GStreamer 1.0. Firefox up until now supported GStreamer 0.1 only which, while still supported is being replaced with the newer version which means that many Linux distributions will move over to GStreamer 1.0 eventually (or may have done so already).
GStreamer adds H.264 video as well as mp3 and aac audio support on Linux systems with GStreamer so that contents can be played directly in the web browser.
Mozilla made the decision some time ago to rely on the operating system's capabilities to play some proprietary formats which the organization won't integrate natively in the browser, and GStreamer is that solution on Linux.
Mozilla has added GStreamer in Firefox 24 Nightly on Linux. Back then, you had to enable the gstreamer.enabled preference in about:config to make use of it.
New Sidebar button
You can display bookmarks and the browsing history in a sidebar in Firefox. This can either be done with a tap on Alt and the selection of View > Sidebar or by using the shortcuts Ctrl-B to display bookmarks in the sidebar or Ctrl-H to display the history instead.
Additional contents, such as social providers or tabs (via third-party add-ons), can be displayed in sidebars in the browser as well.
While only a handful providers support Firefox's Social API, Facebook even removed its implementation again, it is something that Mozilla puts a lot of focus on.
The new sidebar button is available in the customization menu. You can drag and drop it to another location of the browser for easy access.
When clicked on, it displays the available sidebars so that you can open and close them easily using the button.
- Mac OS X command-E sets find term to selected text.
The following changes affect developers. Check the references at the bottom of the page for full details on all changes.
- Disallow calling WebIDL constructors as functions on the web.
- Move some addon-private JSM’s to a subdirectory. (bug 952307)
- Fixes to box-shadow and other visual overflow (bug 480888)
- Mute and audio available when using WebAudio (source)
- background-blend-mode enabled by default
- Use of line-height allowed for <input type="reset|button|submit">
- ES6 array and generator comprehensions implemented. (bug 979865)
- Error stack now contains column number. (bug 762556)
- Support for alpha option in canvas context options.
- Box model highlighter implemented in Developer Tools. (bug 663778)
- Highlight and jump to nodes from the Console.
- Better highlighting for all JS objects and functions in console output.
- Mac OS X: cmd-L no longer opens a new window when no window is available. (Bug 1008793). Will be resolved in Firefox 32.
- Without affecting security, after restoring your session, Extended Validation Certificates might not display (bug 995801). Will be resolved in Firefox 31.
- Slow shut downs lead to 'Firefox is already running' warning. (Bug 966469 and 985655)
- Text Rendering Issues on Windows 7 with Platform Update KB2670838 (MSIE 10 Prerequisite) or on Windows 8.1 has a workaround. (Bug 812695).
- Exit is not always completed when "clear history when Firefox closes" is enabled. Bug (1005487)
Firefox 30 for Android
Quickshare Buttons and the context menu
When you long-tap on elements on a web page in Firefox for Android, a context menu is displayed. If you tap on a link, you get options to open it in a new tab for example or share it.
If you select share, a list of services is displayed that you can select one from. You can for instance share the link using Gmail, on Facebook, or send it to a translate service to translate the destination automatically.
Once you have selected a service from that list, it will be displayed in the main context menu as an icon as well so that you can select it faster the next time.
Add web content to home page panels using Home Feeds Add-On
Firefox Hub is a new feature exclusive to the mobile version of the web browser which enables add-on developers to display feeds in a panel on Firefox's home page.
Version one of the Hub launches with Firefox 30 for Android while version two and three are currently on schedule to be released with Firefox 31 and 32 respectively.
Other mobile changes
- Locales added: Belarusian [be], Argentine Spanish [es-AR], Mexican Spanish [es-MX], Indonesian [id], Latvian [lv], Malay [ms]
Security updates / fixes
Security information are released after the final version of Firefox is out for some time.
- MFSA 2014-55 Out of bounds write in NSPR
- MFSA 2014-54 Buffer overflow in Gamepad API
- MFSA 2014-53 Buffer overflow in Web Audio Speex resampler
- MFSA 2014-52 Use-after-free with SMIL Animation Controller
- MFSA 2014-51 Use-after-free in Event Listener Manager
- MFSA 2014-50 Clickjacking through cursor invisability after Flash interaction
- MFSA 2014-49 Use-after-free and out of bounds issues found using Address Sanitizer
- MFSA 2014-48 Miscellaneous memory safety hazards (rv:30.0 / rv:24.6)
Additional information / sources
- Firefox 30 release notes
- Firefox 30 Android release notes
- Add-on compatibility for Firefox 30
- Firefox 30 for developers
- Hacks Mozilla on Firefox 30 developer changes
- Site compatibility for Firefox 30
- Firefox Security Advisories
Now Read: List of all upcoming Firefox releases