Great Add-On. I have a couple recommendations for the developers, but they're too good to mention here.

Excellent!

I created the account specifically to write this review. I downloaded OneTab to get rid of old and redundant tabs that I had left open. After it succesfully merged them all in one tab, I proceeded to delete the unused ones. After restoring the session my firefox froze and when I opened it up again literally all my tabs were gone.
For many years a lot of people were telling me that I would be better off using using bookmarks more and I think OneTab is all I needed to make me switch.

this extension is a life saver wish i had found it earlier.

>>> UPDATE REQUIRED TO FIX FIREFOX ISSUE ON ANDROID!!! <<< ### DO NOT INSTALL!!! UPDATED JULY 2019!!! ###

This is a must have for researchers, snoopers and the average brained investigator. This extension allows you to categorize what you've been searching, title the bundle in a nice little list, save, lock, create a webpage for sharing and edit. It takes some practice to manage the finger skills and proper drop downs to get your first collection just right. So, play with it while you create your first collection all in OneTab.