Far Too Buggy Not yet rated
Sorry. Tab Mix Plus is a great idea in theory, but it always seems to mess up my Firefox. I have tried numerous extensions, and have found that Tab Mix Plus is the one that causes the most problems, such as slowing Firefox to a crawl, or making it stop responding.
And, you have been warned here, uninstalling it doesn't always fix the problems it creates. I have had to create a new profile to fix the problems Tab Mix Plus created for me.