Firefox 29 ships with an interface redesign called Australis, a new customization mode that goes along with it, and a redesigned Firefox Sync synchronization feature that is incompatible with the old.
Mozilla will make available Firefox 29 to all users of the stable version of the web browser over the course of the next 24 hour period.
Existing Firefox 28 installations will be updated to Firefox 29 in that period if they have enabled automatic updates in the browser. The same is true for Beta, Aurora and Nightly versions of the browser which will receive an update to the next version as well, in this case version 30, 31 and 32 respectively.
The update to Firefox 29 is already available on the official Mozilla FTP repository and third-party sites. While you may head over to one of those download locations right now, it is usually better to wait until the release is officially announced as last minute changes may replace the current build with a different one.
You can check which version of Firefox you are running by tapping on Alt, and selecting Help > About Firefox from the options menu. Alternatively, load about:support in the browser's address bar right away.
If you plan to download the new version, note that net-installers are provided by default. If you want full installers, check out our Firefox full installation guide.
Since this is release with major changes, you may also be interested in testing it before you make the upgrade.
Firefox 29 features a major interface rebuild that Mozilla named Australis internally. A tutorial is displayed on first start to users who upgrade to Firefox 29 which aims to highlight the major changes of the new interface to users to make adaption easier.
A set of new improvements to the Firefox user interface
As mentioned earlier, Firefox 29 ships with a new interface that moves, removes and changes interface elements of the browser.
The new interface is an improvement according to Mozilla, as it is simplified and flexible. It "helps you get things done, faster" thanks to the new tabs design, and the new customization menu.
The first thing you may notice is that the Firefox button is gone, replaced by a Hamburger button on the opposite side of the interface.
You may also notice the curved tabs, that the add-on bar is gone (if you had enabled it), that tabs are no longer displayed on the bottom (if you had them there), that the bookmarks icon has been merged with the bookmarks button and moved out of the address bar, that you cannot move some interface elements such as the back and forward buttons anymore, that buttons are displayed larger (small button mode is gone), and that there is no option to display icons and text in the interface anymore.
You can bring back the majority of interface elements that were removed by installing add-ons. Read our guide on how to do so here.
A redesigned and improved customization mode
The new customize mode displays directly in a browser tab. It allows you to drag and drop most toolbar elements and icons displayed under additional tools and features, to the browser UI.
Note that browser UI in this regard means the main Firefox toolbar, the bookmarks toolbar that you can display additionally, and the new Firefox menu.
You can customize the new menu to your liking, as the majority of icons displayed here by default can be removed. Only the bottom links and buttons starting with "sign in to Sync" cannot be removed or moved.
What is interesting here is that you can move add-on icons to the menu as well, and may need to do so if you have not installed an extension to bring back the add-on bar or another toolbar.
The core reason here is that all add-on icons are now displayed in the main toolbar as well. If you have many, you may notice that not all are displayed here as Firefox cuts them off so that enough room for the address bar and search bar remains.
An interactive onboarding tour to guide users through new interface changes
The tour walks you through some of the new features. Here it is in its full glory:
The ability to set up Firefox Sync by creating a Firefox account
Mozilla decided to redesign Firefox's data synchronization feature and introduce it in Firefox 29. While existing Sync users can still use the old synchronization feature for the time being -- but not add new devices to it anymore -- it will be disabled in the future.
I have published a guide that explains how you can set up the new Firefox Sync on your system. The major change is that you need an email address to set up an account now.
You do use the email address and a password now on all devices once set up to enable the synchronization, so that you do not have to juggle around with keys anymore to do the same.
Note that you will create a Firefox Account in the process.
Gamepad API finalized and enabled
The gamepad API should have been included in Firefox 28 originally but has now found its way into Firefox 29 instead.It was available since Firefox 24, but disabled and had to be enabled on about:config by setting dom.gamepad.enabled to true there. This is no longer the case.
It adds gamepad support to the Firefox web browser which web developers can now utilize for their games.
The Android version of Firefox shares many features with the desktop version. The following major changes have been introduced in Firefox 29 for the Android operating system.
Security updates / fixes
Security information are published after the release of the new Firefox version. We add the information once they become available to the public.
MFSA 2014-46 Use-after-free in nsHostResolve
MFSA 2014-45 Incorrect IDNA domain name matching for wildcard certificates
MFSA 2014-44 Use-after-free in imgLoader while resizing images
MFSA 2014-43 Cross-site scripting (XSS) using history navigations
MFSA 2014-42 Privilege escalation through Web Notification API
MFSA 2014-41 Out-of-bounds write in Cairo
MFSA 2014-40 Firefox for Android addressbar suppression
MFSA 2014-39 Use-after-free in the Text Track Manager for HTML video
MFSA 2014-38 Buffer overflow when using non-XBL object as XBL
MFSA 2014-37 Out of bounds read while decoding JPG images
MFSA 2014-36 Web Audio memory corruption issues
MFSA 2014-35 Privilege escalation through Mozilla Maintenance Service Installer
MFSA 2014-34 Miscellaneous memory safety hazards (rv:29.0 / rv:24.5)
Additional information / sources
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