I NEVER post reviews, so you know it is BAD when I'm forced to. Onetab crashed my browser and now I've lost months of research. I just installed the add-on, while I had over 1250 tabs in my browser. After installation I clicked on the icon, thinking it would pop open a selection window like many other add-ons. NOPE, Onetab closed ALL my tabs, which is not what I wanted. I saw the option to restore all so I selected that. It reopened all tabs (1250) but as you may know Firefox cannot handle opening that many tabs at once and it hung Firefox up. I gave it my normal 15 minutes to see if it would recover, it did not so I had to do a forced power off reboot. I've been using Firefox for almost 20 years, so I deeply understand how it handles the hundreds and sometime thousands of tabs I will have open for my research. Of course you can never reload all tabs at one time as when you have to many tabs active it slows down or crashes Firefox. So I reboot my machine once per day or after working on several hundred tabs. When it reopens I can go to the tabs I need to continue work on and only those will open.
After the crash, Only the Onetab tab was open, my 1250 tabs were gone and the Onetab showed no saved tabs. I tried using the standard Firefox "Restore All Tabs" function and it only opened 24 of my 1250 tabs, the rest were completely gone. I tried going to my History and copied all tabs from the last 7 days, but got 3,654 tabs, and I only worked on maybe 300 tabs in the last week. I then copied all tabs from the last month and got 7,359 tabs. While I've never copied tabs from the History section I've never seen numbers like that. I backup all tabs once per week to a bookmark file. When I copy all tabs from there it is always the exact number I have open, in the case of last weeks backup it was 2,641. Last week, as normal, I see it is that high and I go and close as many old research tabs as possible, so that is why this week it was down to 1250 tabs. But not Onetab, while a great concept has cost me the lost of one week of work. I could spend the entire rest of the day painfully going through the last weeks history and reopening every single lost tab, one by one, but this is so painful and I loose another full day of work.
UNINSTALLED, yet another Tab Add-On that causes crashes and corruptions, beware, if you use more then ten tabs as once, DO NOT INSTALL THIS ADD-ON.