I'm writing this on my phone while I wait for the extension to restore all the tabs in my PC (so that I can delete the extension).

I expected it to be bad but I decided to give it a try since it was a recommended extension. I certainly didn't expect it to hog all my RAM and make my system unusable

I eventually got it to collect all open tabs into one but it did not allow to restore them again. Cleared all, restarted pc and the same thing. Seems it does not work that well

Update: Yay! It deleted all my tabs again, for the hundredth time! This has happened over and and over and over again, I have lost years of data by trying to keep using this addon. What the hell is wrong with the devs. Only just now are they TALKING ABOUT adding a backup feature??? If I had a dollar every time this addon has wiped I would go out to a nice lunch instead of writing this.

why does this extension constantly duplicate itself? without fail it will show up as two of itself running in the task bar, one of them will work and one will not. It can only be fixed by uninstalling the addon. This has happened easily 6+ times, this is reoccurring and repeatable.

Why do all the links I've saved always disappear suddenly and randomly?

Hi, after enabling this extension, Firefox stops opening pages or loads them very slowly after some time. Restarting the browser temporarily fixes it. I experienced this issue on my Mac, and after Firefox Sync installed the same extension on my Windows laptop, the exact same problem started happening there as well. Please fix

10/10/25 Mozilla can't handle the heat from all the incompetent add on "developers" so they are now trying to censor users by requiring and email address to login. One tab is a classic example of a Mozilla "recommended" add-on that is just no damn good.

Can't deal with long tab lists and
reduces your system to a crawl by eating up memory to produce the list. One example of many mozilla add-ons that need to be sold to someone who actually knows what they are doing. Slow to load very slow to import export which has to be done manually. Another junk Mozilla "Recommended" add-on
Now let's see if Mozilla deletes this review or my account.
Mozilla going the way of GMAIL. God help us.

The extension consumes all RAM and makes PC unusable. With 100 tabs on the list (closed) and 2 open tabs it eats all 8GB and all disk swap. Giving the fact the goal of extension is to save RAM, this makes no-sense.

It is restoring tabs, one by one, so when I had 5600 tabs, it was trying to restore (open) a 5600 tabs one by one.
Browser of course crashed, so I was not able to open my tabs.
It is not possible to make "auto groups" based on domain or regular expression.

DANGER. The app slows down the system a lot. And if you use groups for tabs, it deletes them!

ОПАСНО. Приложение сильно тормозит систему. А если вы используете группы для вкладок, то она их удаляет!

탭 복원을 하면 파폭의 탭그룹을 다 날려 버립니다.. 날아간 탭그룹은 복원할 방법도 없습니다. 와 내 탭들...

唐突に保存してたタブが全部消えました。
まだ無事な方はすぐにエクスポートしてください。
All of my saved tabs suddenly disappeared.
If yours are still intact, export them immediately.

It finally happened... Multiple months worth of tabs instantly gone, the addon froze up and the extension menu for saving tabs wouldn't work, I close Firefox and then its completely empty. This extension hasn't been updated in a long time as well, I think it's time to find an alternative.

lost all my tabs...like years of tabs...and I just now realized there is no save file...just fucking url save files that you yourself have make in txt file format....yeeears of tabs and no way to get them back

onetab is a ticking time bomb bro, sooner or later you will lose all your tabs for absolutely no reason. gg.