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1. Firefox 2013
2. Firefox 20 Download
3. Mozilla Firefox 20

Firefox 20 will be released on April 2nd. Here’s the list of changes that went into this version that can affect add-on compatibility. There is more information available in Firefox 20 for Developers, so you should read that too. When doing lazy tab restoration, set the s in question to display:none. This helps reduce memory. Firefox 2.0.0.20 ISO by Mozilla Corporation. Publication date 2008-12-18 Topics firefox Collection cdromimages; vintagesoftware Language English.

Firefox 2 Release Notes

These Release Notes cover what's new, download and installation instructions, known issues and frequently asked questions for Firefox 2. Please read these notes and the bug filing instructions before reporting any bugs to Bugzilla.

Give us your feedback through this feedback form.

What's New in Firefox 2.0.0.20

Note: This is the last planned release of Firefox 2. All users are encouraged to upgrade to Firefox 3. Firefox 2.0.0.20 does not include Phishing Protection.

Release Date:

December 18, 2008

Security Update:

Firefox 2.0.0.20 includes an additional security fix over Firefox 2.0.0.19 for users of the Windows platform. The following security issue was fixed.

Earlier Changes:

For information about previous changes, please see the Firefox 2.0.0.19 Release Notes.

Downloading and Installing

System Requirements

Before installing, make sure your computer meets the Firefox 2 system requirements.

Downloading Firefox 2

Mozilla provides Firefox 2 for Windows, Linux, and Mac OS X in a variety of languages. You can get the latest version of Firefox 2 here. For builds for other systems and languages not provided by Mozilla.org, see the Contributed Builds section at the end of this document.

Installing Firefox 2

Please note that installing Firefox 2 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.

Removing Firefox 2

You can remove Firefox 2 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 2 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:

Any version of Firefox that you install after removing Firefox 2 will continue to use the data from this profile folder.

Known Issues

This list covers some of the known problems with Firefox 2. Please read this before reporting any new bugs.

• Some firewall software may silently block Firefox from running. This often happens immediately after Firefox has been installed or updated from a previous version. There are configuration instructions available for most popular firewall programs to help you ensure that Firefox is allowed to connect to the Internet.
• Dictionaries for several locales can't be packaged with the builds, and must be manually downloaded by right-clicking in a text area and selecting 'Add Dictionaries...' from the shortcut menu. New dictionaries are regularly being added to Mozilla Add-ons, so if you don't see the particular dictionary you need, check back later.
• Access key definitions provided by web pages can now be triggered using Alt+Shift+key on Windows, Ctrl+key on Mac OS X, and Ctrl+Shift+key on Unix.
• The Session Restore functionality provided in Firefox 2 will restore connections to services which use session cookies to maintain login state such as GMail. It is recommended that users with concerns about the privacy implications of this behavior change the value of browser.sessionstore.resume_from_crash to false.
• The option for 'Shrink to fit' has been removed in Firefox 2. If you wish to change this from the value you had set in your previous version of Firefox, change the value of browser.enable_automatic_image_resizing.
• Software Update will not work if Firefox is installed to a location on your disk to which you do not have write access, since Software Update needs to replace or create files in this location.
• Some financial institutions use port 563 for secure logins, which results in an error message. If you encounter this error, make sure that network.security.ports.banned.override includes 563 in the comma-separated list of banned network ports to override.

• The Java Console extension that came with Java SE 6.0u1 (J2SE6.0.01) is incompatible with Firefox as reported in Bugzilla. Java should work as expected, but the menu item 'Java Console' will not be available in the Tools menu. This issue has been fixed in Java SE 6.0u2 (J2SE6.0.02) and later versions and is available for download from the Java website.
• Clicking links in some applications (e.g. some instant messaging programs) might not open them in Firefox, even if you have set it as your default browser. To workaround this problem, go to Start -> Default Programs -> Set default programs for this computer, expand custom, select the radio button next to the app you want to set as the system wide default app (e.g. Firefox, etc.), and apply.
• The Windows Media Player (WMP) plugin is not provided by default in all versions of Windows. If you are having trouble playing Windows Media content in Firefox, download and install the Windows Media Player Plugin for Firefox.
• Vista Parental Controls are not completely honored. In particular, file downloads do not honor Vista's parental control settings. This will be addressed in an upcoming Firefox release.
• When migrating from Internet Explorer 7 to Firefox, cookies and saved form history are not imported.
• Use of the install-global-extension and install-global-theme command line arguments have been restricted to only allow installing add-ons that are on local disks or mapped drives. Installing from a network share directly will no longer succeed.

• On OS X 10.5 (Leopard), there are known problems with some media plugins as well as Add-ons that contain binary components.
• The 'Close Other Tabs' action on the shortcut menu of a tab can fail with an error when more than 20 tabs are open.
• Some users have reported problems viewing Macromedia Flash content on Intel Mac computers. To work around this problem, users can remove or move the PowerPC version of 'Flash Player Enabler.plugin' from /Library/Internet Plug-Ins.
• After installing a new plug-in, Firefox may continue to display information for the older version of the plug-in in about:plugins. If this happens, quit Firefox, delete the 'pluginreg.dat' file from your profile folder, and relaunch Firefox.
• Java does not run on Intel Core processors under Rosetta.
• There is no Talkback on Intel-based Macs when running natively or under Rosetta. The Apple Crash report program should launch in the event of application crashes.

• If Firefox is installed to a location with spaces in the path, it may not be able to set itself as default browser and may keep prompting at startup. The work around is to install into a path without spaces.

Firefox 2013

Troubleshooting

• 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-mode and on Mac OS X, run:

  cd /Applications/Firefox.app/Contents/MacOS/
./firefox-bin -safe-mode

  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

1. 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.

2. Why haven't you responded to the mail I sent you?

   Use the forums. The Firefox team reads them regularly. We all get a lot of email and your email may get lost.

3. Where can I get extensions and themes (add-ons)?

   Firefox Add-ons.

4. Who makes Firefox 2?

   Lots of people. See Help->About Mozilla Firefox, Credits for a list of some of the people who have contributed to Firefox 2.

5. Where's the Firefox 2 source code?

   A tarball of the Firefox 2 source code is available for download. The latest development code can be obtained by cvs. Firefox-specific source is in 'mozilla/browser', 'mozilla/toolkit', and 'mozilla/chrome'. Please follow the build instructions.

6. Where is the mail client?

   Firefox 2 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.

Contributed Builds

Firefox 20 Download

Mozilla Firefox 20

Many localized builds are now produced and distributed by Mozilla.org on behalf of their authors. These are available on the Firefox 2 download page.

These are unofficial builds and may be configured differently than the official Mozilla.org builds. They may also be optimized and/or tested for specific platforms.

Other Resources and Links

The following resources contain useful information about Firefox 2:

Firefox ended support for Adobe Flash in Firefox at the end of 2020, as announced back in 2017. Adobe and other browsers also ended support for Flash at the end of 2020.

Firefox version 84 was the final version to support Flash. Firefox version 85 (released on January 26, 2021) shipped without Flash support, improving our performance and security. There is no setting to re-enable Flash support.

No. Adobe and other browsers also ended Flash support at the end of 2020.

Even if you install an older version of Firefox, the Flash plugin itself stopped loading Flash content as of January 12, 2021. See Adobe’s Flash Player End of Life information page for more details.

For enterprise customers who need help transitioning Flash content to other supported technologies or require Flash Player licensing support after 2020, please contact Adobe’s official distribution licensing partner, HARMAN, for more information about their commercial support offerings.