It's because of IME, not browser or addon, sorry.
(X)Can not named the group...Ubuntu1404(x64) and FF57.

I've been using OneTab, it was great until I've lost all the tabs (300+ of them) suddenly. I'm not entirely sure why this happenned, my FireFox is version 48.02 as I haven't been able to update it since my Mac OS has become outdated. Maybe the OneTab has become too new for my browser? I now see the "file not found" page on my OneTab tab, and I can no longer see the icon of OneTab either on the toolbar or in the list of add on-s...

very nice

Really useful! I love it!
(My only complain: it doesn't on Firefox 57 for Android)

Great addon. Very usefull. I backup the list of urls now and then to be safe, but it works fine for me.

It could use more user friendliness like shortcuts for more actions or more options to arrange the urls in the list and behavious of the groups.

Please cooperate with these guys, gestures would be very usefull.
https://github.com/marklieberman/foxygestures/issues/146
https://github.com/Robbendebiene/Gesturefy/issues/135

Extensão muito boa, uso a toda hora e me economiza memória.

Boom

終了時に保存してくれるといいなぁ。

I just clicked the button while watching Resource Monitor, my used memory drop by half. I think i'm in love.

This is one of my all time favorite extensions; on both firefox and chrome.

I think this is a great replacement for Tab Groups (the original Firefox version that was deprecated and the great add-on by Quicksaver that has gone extinct).

I wish we could click to drop down the icon on the toolbar to switch between named groups like we could in the Quicksaver version. The ability to save the entire set dynamically (without having to import and export) and switch between them like with Session Manager would be awesome as well.

The context menus are great and have a lot of options for grabbing sets of tabs to add to the list.

I did not use this add-on in FF56, so I can't speak to the upgrade path, but it seems as though they have instructions to follow for downgrading.

Works flawlessly so far with the new WebExtensions. Only thing would be an option to secure it with a cloud like DropBox if any browser loss would occur And an option to sort the tabs by name, date, url would be practical. Otherwhise good one.

Lost all my tabs, it didnt just not work, it actively ruined my browser organization.