Excellent Add-On. Useful and light on resources with no fuzz. Lots of options with more added constantly. Active development and Dev is very receptive and open to feedback. Which is a plus.

Definitely try it out if looking for vertical styled tab browsing. For me it works best with a sidebar.

Trying out the extension and it's pretty good. Wondering if it would be possible to add an option to add url of the tab underneath each tab title (right now it is either tab title or url, it would be useful to have both),
because some websites don’t tell you anything on their title,
while some websites don’t tell you much from the url,
especially when I have a bunch of different pages open from the same website, it takes a while to find the tab I am looking for.
Thank you so much for the extension.

Edited: OMG that was so fast. It was impossible to find an actively developing sidebar/vertical tabs extension with this function. Thank you so much!

I use it to quickly find a specific tab when i have too many opened.