The events you can assign an action to are:

• Double clicking
• Clicking with middle mouse button
• Left clicking with control-key (or meta-key on Mac) pressed
• Left clicking with alt-key pressed
• Left clicking with shift-key pressed

And the actions which you can choose from are:

• Open a new tab
• Reload the tab
• Reload all tabs
• Close tab
• Close other tabs
• Close all tabs
• Duplicate Tab
• Duplicate Tab in New Window
• Undo Close Tab (only in Firefox 2.0 beta or with extensions)
• Bookmark Tab
• Bookmark All Tabs (not in Firefox 1.0)
• No Action

This is no doubt that Tab Clicking Options makes it easier to work with your tabs in a number of different ways.  Also, because I know somebody will bring it up – Tab Mix Plus will also do a lot of these same things too. So if you want an alternative – there you go.  (via Download Squad)

Bonus: Via Twanno’s Firefox extensions page you can also pick up his Duplicate Tab add-on for the browser.  It allows you to clone a tab along with its history.

Assign keywords to your search engines for quick and easy access to all of your search engines without using the search bar and without having to switch from your current search engine. To use, add keywords to your search engines via the search engine manager and then simply type ‘keyword searchterm’ into the address bar and search away!

This gives you another quick way to do your searches.

+ Download and Install the SearchWords Extension for Firefox!