Tab Mix Plus: Tabbed Firefox Browsing the Way It Should Be

I stumbled upon the Tab Mix Plus extension for Firefox yesterday and I fell in love with it on the spot. Finally there's someone who understands tabbed browsing and realizes what's missing in Firefox' default implementation. I urge the devs to incorporate this extension into head. This is not an extension, it's crucial! If you use tabs, go get it! If you understand the difference between Ctrl-Tab Ctrl-Tab and Ctrl-Tab-Tab, run and get it!

Some of the features:

• Session saver (When starting Firefox, it restores all tabs that were open when you quit Firefox)
• Undo closing a tab
• Open new tabs next to existing ones instead of at the end of the list.
• Ctrl-Tab moves to the previously active one instead of the next one in the tab list.
• Organizes tabs in multiple rows if you have many tabs open.
• Ctrl-W'ing the last tab doesn't close Firefox anymore.
• Customize mouse and keyboard events, tab font and color.

All of these are optional. If you don't like one, you can switch it off.