Great Add-on Rated 4 out of 5 stars
I've been looking for something like this for ages. Really is a must have for a browser in my opinion.
It does exactly what it says on the box, as it were. The only negatives are those that have been voiced before. Keyboard shortcuts don't tend to work - the ability to 'focus' on a particular 'split' is fairly essential I think. Being able to have tabs within a 'split' would be nice too (think this might be possible but haven't figured out how to yet). Still a great add-on though :)