Rated 4 out of 5 stars

I really liked this tab counter when it worked, I always like to know how many open tabs I currently have because sometimes I have as many as 700+ tabs open. Two problems thou, when I first installed it in Firefox 43.0.1 it wiped out all of my current open tabs. It also worked in Firefox 49.0.1 when I updated Firefox. Then I installed Session Manager and this Tab Counter stopped working. Tried a reinstall but still no luck.