Great. A bit clumsy in manipulating groups, but extremely effective in reducing FF crashes and slowdowns. Recent updates have solved several minor user interface problems.

Thank you for adding a dark mode.

Очень незаменимое дополнение особенно для тех кто ведёт много проектов одновременно

I cannot express my feelings when tabs that have been there for months, are gone after trying the restore all function of this addon. It failed to restore all the tabs and now they are gone. Several of those tabs where markers to particular links that needed to be checked periodically or something similar, now all except 15, the oldest 15 at that, remain.

Great Add-on BUT it stopped working several times and made the saved Tabs inaccessible.
No response from the developers. :((

This is my favorite extension for any browser. I was mad the first time it crashed and when I noticed the high CPU usage but the solution is to backup your URLs to notepad using export in onetab before you reach 400 and then remove them from one tab. They are easily imported/exported back and forth. With notepad you can save different files for each subject.

No longer working properly, used tons of CPU and memory while it's tab was open.

Restore all tabs not working

it lost my tab.
i have 400+tab ,when i add this addon to my firefox , it only get 100 tab . the others lost .

Excellent..., Excellent..., Excellent...

es muy buena

It was perfect till few months ago - now not so much. Crashes browser and worst of all does not save favicons. Had to remove it

I clicked the icon, it grabbed all my tabs automatically without asking confirmation. I tried to restore them, because it had closed them and added them to the list. When I clicked Restore all tabs, IT LOADED ALL OF THEM AT ONCE... I had several hundreds of them. It broke the browser, and I lost them all.
Not recommended at all.

CAUTION: I added OneTab to Firefox and don't want to use it. I want my tabs back where they were, but can't find out how to do this. OneTab has no function to delete it and restore my tabs. Why?

При восстановлении вкладок, восстановил только часть, а остальные пропали. Не пользуйтесь этим говном, если не хотите потерять свои вкладки.