About this Release Candidate
Firefox 3.5 (Release Candidate) is the latest development milestone of Firefox 3.5, the next version of the Firefox web browser. While this release is considered to be stable, it is intended for developers and members of our testing community to use for early evaluation and feedback. Users of the latest released version of Firefox should not expect all of their add-ons to work properly with this milestone.
Check out what’s new, the known issues and frequently asked questions about the latest version of Firefox. As always, you’re encouraged to tell us what you think, either using this feedback form or by filing a bug in Bugzilla.
What’s New in Firefox 3.5 (Release Candidate)
Firefox 3.5 (Release Candidate) is based on the Gecko 1.9.1 rendering platform, which has been under development for the past year. Firefox 3.5 offers many changes over the previous version, supporting new web technologies, improving performance and ease of use, and adding new features for users:
- This release candidate is now available in more than 70 languages - get your local version.
- Improved tools for controlling your private data, including a Private Browsing Mode.
- The ability to provide Location Aware Browsing using web standards for geolocation.
- Support for native JSON, and web worker threads.
- Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.
Developers can find out about all the changes and new features at the Mozilla Developer Center.
Before installing, make sure your computer meets the system requirements.
Mozilla provides Firefox 3.5 (Release Candidate) for Windows, Linux, and Mac OS X in a variety of languages. You can get the latest version of Firefox 3.5 (Release Candidate) here. For builds for other systems and languages not provided by Mozilla.org, see the Contributed Builds section at the end of this document.
Please note that installing Firefox 3.5 (Release Candidate) will overwrite your existing installation of Firefox. You won’t lose any of your bookmarks or browsing history, but some of your extensions and other add-ons might not work until updates for them are made available.
You can remove Firefox 3.5 (Release Candidate) through the Control Panel in the Start Menu on Windows, by removing the Firefox application on OS X, or by removing the firefox folder on Linux.
Removing Firefox 3.5 (Release Candidate) won’t remove your bookmarks, web browsing history, extensions or other add-ons. This data is stored in your profile folder, which is located in one of the following locations depending on your operating system:
|Windows 2000, XP, Server 2003||Documents and Settings\<UserName>\Application Data\Mozilla\Firefox|
|Mac OS X||~/Library/Application Support/Firefox|
|Linux and Unix systems||~/.mozilla/firefox|
Any version of Firefox that you install after removing Firefox 3.5 (Release Candidate) will continue to use the data from this profile folder.
Extensions and Themes
Extensions installed under Firefox 3 may be incompatible and/or require updates to work with Firefox 3.5 (Release Candidate). Please report any issues to the maintainer of the extension. When you install Firefox 3.5 (Release Candidate) all of your Extensions and Themes will be disabled until Firefox 3.5 (Release Candidate) determines that either a) they are compatible with the Firefox 3.5 (Release Candidate) release or b) there are newer versions available that are compatible.
This list covers some of the known problems with Firefox 3.5 (Release Candidate) which will be fixed in future versions:
- All Systems
- After installing this version, users will not be able to return to a previous beta version of Firefox 3.5 without creating a new profile (see bug 488966)
- Restoring your bookmarks from a backup can take some time, during which the browser may seem unresponsive (see bug 493731)
- If a pop-up window is focused when you enter Private Browsing Mode, the Location Bar in the first Private Browsing Mode window will not be editable. Opening a new window fixes the problem (see bug 495495)
- After using Clear Recent History some SSL sites will not load all images and styles without pressing reload (see bug 480619)
- Firefox 3.5 will only support color profiles as specified by ICC v2, later versions will add suport for ICC v4 (see bug 463221)
- Users viewing images using ICC v2 color profiles on monitors with wide gamut levels may find them to look more saturated (darker) than expected (see bug 497363)
- Websites using the new downloadable font support that wish to change the color using :hover will also need to add text-rendering : optimizeLegibility for font sizes less than 20 pixels (see bug 495455)
- Some sites with Flash can cause problems with the Cookies dialog (see bug 495035)
- Web pages can no longer automatically install PKCS11 cryptographic tokens. Users are now required to do this manually or install an Add-on that installs them (see instructions and documentation)
- Microsoft Windows
- Pressing enter in the Location Bar will not do anything if you are running AVG SafeSearch v8.0 or lower. Upgrading AVG SafeSearch fixes the problem (see bug 479095)
- If you select Fax from the Print Dialog, the Windows Fax dialog will appear and then disappear. Faxing still works from other applications (see bug 440486)
- Mac OS X
- Java applications that rely on tracking the mouse position may not function properly (see bug 495278)
- If the user repeatedly changes the paper size and asks for a Print Preview, Firefox may crash (see bug 495567)
Poorly designed or incompatible extensions can cause problems with your browser,
including make it crash, slow down page display, etc. If you encounter strange
problems relating to parts of the browser no longer working, the browser not
starting, windows with strange or distorted appearance, degraded performance, etc,
you may be suffering from Extension or Theme trouble.
Restart the browser in Safe Mode. On Windows, start using the "Safe Mode" shortcut created in your
Start menu or by running
firefox.exe -safe-mode. On Linux, start with
./firefox -safe-modeand on Mac OS X, run:
When started in Safe Mode all extensions are disabled and the Default theme is used. Disable the Extension/Theme that is causing trouble and then start normally.
- If you uninstall an extension that is installed with your user profile (i.e. you installed it from a Web page) and then wish to install it for all user profiles using the -install-global-extension command line flag, you must restart the browser once to cleanse the profile extensions datasource of traces of that extension before installing with the switch. If you do not do this you may end up with a jammed entry in the Extensions list and will be unable to install the extension globally.
- If you encounter strange problems relating to bookmarks, downloads, window placement, toolbars, history, or other settings, it is recommended that you try creating a new profile and attempting to reproduce the problem before filing bugs. Create a new profile by running Firefox with the -P command line argument, choose the "Manage Profiles" button and then choose "Create Profile...". Migrate your settings files (Bookmarks, Saved Passwords, etc) over one by one, checking each time to see if the problems resurface. If you do find a particular profile data file is causing a problem, file a bug and attach the file.
Frequently Asked Questions
What can I do to help?
We need help from developers and the testing community to provide as much feedback as possible to make Firefox even better. Please read these notes and the bug filing instructions before reporting any bugs to Bugzilla. You can also give us your feedback through this feedback form.
Where can I get extensions and themes (add-ons)?
Extensions and Themes can be downloaded from Firefox Add-ons.
Who makes Firefox 3.5 (Release Candidate)?
Lots of people. See Help->About Mozilla Firefox, Credits for a list of some of the people who have contributed to Firefox 3.5 (Release Candidate).
Where’s the Firefox 3.5 (Release Candidate) source code?
A tarball of the Firefox 3.5 (Release Candidate) source code is available for download. The latest development code can be obtained through Mercurial. Firefox-specific source is in mozilla-central's "browser", "toolkit", and "chrome" directories. Please follow the build instructions.
Where is the mail client?
Firefox 3.5 (Release Candidate) works with whatever mail client is the default on your system. However, we recommend Mozilla Thunderbird, our next-generation email client and the perfect complement to Firefox.
These are unofficial builds and may be configured differently than the official Mozilla builds. They may also be optimized and/or tested for specific platforms. You can browse through the available contributed builds on the FTP site.
Other Resources and Links
The following resources contain useful information about Firefox 3.5 (Release Candidate)
- Firefox Support Page
- MozillaZine's Knowledge Base
- Developer Information