Great addon! I love it! But, since a few weeks I got always this message, when I open the browser:

Simple Tab Groups addon conflicts with the following enabled extensions:

Enabled:
Tab Session Manager

To avoid losing tabs or their location in windows and groups, it is strongly recommended to turn off or remove enabled extensions that conflict with the Simple Tab Groups addon. You can do this on the addons settings page "about:addons" or by pressing the key combination Ctrl+Shift+A

???

This extension saved my butt! I had to reboot my computer (forced to do so by Microsoft Windows update actually)... and when I opened Firefox, it didn't restore my tabs for some reason. This extension restored the previous session perfectly.

Love it, much better than many other clumsy "session sync/save" extensions. Unintrusive, lightweight... I'm proud of you sienori

This is probably the most useful add-on I have. Being able to change between workflows with the click of a button is truly invaluable. I had a little trouble syncing my backup in the beginning but logged out and back in and it's worked great ever since.

Thanks for all your hard work creating it dev(s)!

was able to save and load a session, but since i use tree style tab - the hierarchy of the tabs was lost. thankfully, the vertical order was preserved, so only the 'groupings' were lost.

honestly, it was not a big deal at all. (took less than a minute to put them back into groups manually for quite a few tabs)

i don't honestly expect a third party extension to play nice with every other third party extension - that would be crazy. as far as i'm concerned, this extension did exactly what it said it would do.