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Tab Mix Plus is a very popular legacy extension for the Mozilla Firefox browser that enhances Firefox's tab browsing abilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more.

Session Manager feature is not included at the moment since it requires complete rewrite.

If you are interested in keeping Tab Mix Plus working, please donate.

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Exciting News! ✨

Excited to Announce a New Home for Tab Mix Plus Documentation!

I'm thrilled to share the launch of a brand-new website dedicated to the Tab Mix Plus extension documentation! If you've been looking for clearer instructions, smoother navigation, and an overall better experience with Tab Mix Plus documentation, this site is for you.

Here's what you can expect:

• Step-by-step installation: Getting started with Tab Mix Plus just got easier thanks to detailed instructions and troubleshooting tips. Read More

• Modern design: Say goodbye to clutter and hello to a clean, contemporary interface that's easy to read and navigate.

• Improved search: Find the information you need instantly with my enhanced search functionality.

• Accessible everywhere: Whether you're on a desktop, tablet, or mobile phone, the responsive design ensures a smooth experience.

I encourage you to explore the new documentation website and share your feedback! Your input is invaluable in helping me continuously improve the documentation and make it even more helpful for everyone.

Ready to take a look?

• Visit the new documentation web site.
• Learn how you can contribute to the docs.

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Table of Contents

• Installation
• Troubleshooting
• Browser Compatibility
• Configuration
• Docs

Installation

1. Legacy extensions loader
   Since Firefox removed the internal component that loads legacy extension, in order to install Tab Mix Plus, or any other legacy extension, you have to install 3rd party helper scripts.

   1.1. Open about:support and locate the path to your Application Binary and Profile Folder.

   screenshoot

   

   1.2. Install configuration files to your Application Binary folder.

   fx-folder.zip files are packed with paths used by Firefox for Windows, Linux and MacOS users should follow the instructions below.

   Linux

   Note: The default path to Firefox on Linux is typically /usr/lib/firefox/.

   Verify the path:

   Check the actual path to your Firefox Application Binary. If it differs from /usr/lib/firefox/, replace the path accordingly in the following instructions.

   Copy the configuration files extracted from fx-folder.zip:

   • copy config.js to /usr/lib/firefox/config.js
   • copy config-prefs.js to /usr/lib/firefox/browser/defaults/preferences/config-prefs.js
   Linux with Snap

   Compatibility Note:

   Firefox snap for Linux versions prior to 108 are not supported.

   Instructions for Firefox snap 108 or newer

   Verify installation path:

   If you're uncertain about the installation path of your Firefox snap, use the command snap list firefox in your terminal to check.

   Copy the configuration files extracted from fx-folder.zip:

   • copy config.js to /etc/firefox/config.js
   • copy config-prefs.js to /etc/firefox/defaults/pref/config-prefs.js

   Create subfolders if necessary

   If the folders /defaults or /pref don't exist within /etc/firefox/ create them.

   MacOs

   Note:

   The default path to Firefox on MacOs is typically Firefox.app/Contents/Resources.

   Verify the path:

   Check the actual path to your Firefox Application Binary. If it differs from Firefox.app/Contents/Resources, replace the path accordingly in the following instructions.

   Copy the configuration files extracted from fx-folder.zip:

   • copy config.js to Firefox.app/Contents/Resources/config.js
   • copy config-prefs.js to Firefox.app/Contents/Resources/defaults/pref/config-prefs.js

   1.3. Create chrome folder in your Profile Folder (if one does not exist).

   1.4. Extract utils folder inside the chrome folder, the result should be [PROFILE_NAME]/chrome/utils, all the files should be in the utils folder (see the screenshot below).

   screenshoot

   

   1.5. Open about:support page and click "Clear startup cache…" to force Firefox to load the installed scripts on the next startup.

   1.6. Start Firefox again.

   1.7. Follow the instructions below to install Tab Mix Plus.

2. Download XPI

   Download xpi file from our releases page to your local computer.

   All Tab Mix Plus downloads are also located here.

   If you are using Firefox Beta, Developer Edition or Nightly we recommend using the latest Tab Mix Plus development build (tags with pre or test-build in the title)

3. Install XPI

   To install the file you have just downloaded:

   • Open Add-ons Manager tab (about:addons) and select Extensions.
     or
     Click the menu button ☰, click Add-ons and Themes and select Extensions.
   • To add the downloaded add-on to the list of available add-ons, drag and drop the file into the Add-ons window. The add-on is added to the list.
   • The installation process should begin.

Troubleshooting

If Tab Mix Plus stops working after Firefox update was installed or when you try to install Tab Mix you get a message that it appears to be corrupt, follow these instructions

• Uninstall Tab Mix Plus.

• Close Firefox and reinstall the latest versions of these scripts (see instructions above):

  • Install configuration files to your Application Binary folder.

  • Extract utils folder to chrome in your in your Profile Folder.

• Some users report that their Firefox is not able to install or use Tab Mix Plus unless they set extensions.experiments.enabled to true in about:config.

• Open about:support page and click "Clear startup cache…" to force Firefox to load the installed scripts on the next startup.

• After Firefox starts Reinstall latest Tab Mix Plus again.

Browser Compatibility

• Firefox 78 - Firefox Nightly
• Waterfox G3 - G6 and beyond

For Pale Moon download Tab Mix Plus from here

Configuration

Tab Mix Plus comes with Options window that includes all of its preferences as well as adding user interface to important Firefox hidden preferences. It is recommended that you make all changes to the preference in the options window. The options window is available from the Add-ons Manager or from the Tools menu (unless you turn this option off).

Docs

Read the docs (please 🙏):

Help

Troubleshooting

Change Log