Rated 3 out of 5 stars

Works, but if you've got TabMixPlus (see above for the fix) it's largely redundant. I suppose if I had a massive amount of desktop real estate at my disposal it'd be a lot more useful, but I just can't see what's going on. It's a bit like having four mobile phone screens on your screen that you can use together at the same time. I can possibly see it being useful for copying and pasting content between a web page and a forum thread, for example.

This review is for a previous version of the add-on (0.7.1).