At least good news for Tabgroup user. Not as powerful as tabgroups yet. but hey respect for bringing it so far.

As improvements i like to see
1. Make the drop down window a bit wider, when there are more then 10 Workspaces a vertical Scrollbar appears and forces a horizontal scrollbar to appear.
2. A option to save my Tabgroups to a file as backup.

Thanks, Fonso for your Tab Groups version, it's a good job! I have just a request : I would like an option that lets the user remove the background colour theme. White is beautiful ;)

How to move a tab another workspace?

登録したタブが全部一瞬で消えた。
使えない！！！！

Tab Groups was what really set Firefox apart from other browsers, and it was the one feature I was really, really going to miss in FF57. I'm glad a wizard like Fonso managed to create a Webextension that retains much of the functionality of Tab Groups, even if it's not 100% there. Thanks, Fonso!

The only real problem (so far) that's not due to limitations of Webextensions: The toolbar icon is VERY hard to see in "dark" Firefox themes... think dark grey on even darker grey/black. I'd like the icon revised to include some color/fill so it stands out no matter what the Firefox theme colors.

I was a fan of Tab Groups, used it all the time and got desperate when I heard it wouldn't be running on FF 57. I was considering writing an extension to replace it, but Fonso did all the work for me and that's wonderful! Of course I liked the full-screen display of all my groups and tabs in Tab Groups, but understand it's impossible to replicate. On the other hand, closing the unused groups or workspaces frees RAM, along with the new efficiency of FF 57. With FF 55 and Tab Groups I usually climbed up to 4GB (25% of my RAM), and at that point, FF began to slow down and bug; I knew I had to close it down and restart it. With FF57 and Tab Workspaces, FF uses only a few percents of my RAM! It's very useful because I multi-task a lot with memory-hungry programs (e.g., GIS software + Illustrator + InDesign + Acrobat etc).

Only 4 stars because I find annoying that switching to another workspace loads all the pages in this workspace, which (1) takes some time, (2) forces to go to some tabs to stop videos from starting. I would suggest :
-either to provide a list of the tabs when selecting a workspace, so you could choose the tab you want to open (but still display all the tabs, ready to be re-opened)
-or arbitrarily only open the leftmost or the rightmost tab for example (while displaying all the tabs as above)
Is it technically possible?

A relief to find something that's getting close to the functionality of the much-lamented Tab Groups, but I did almost scream with anguish when I discovered that it doesn't save between sessions, and that a restart following an update threw away nearly 40 tabs in seven carefully constructed groups.

it's worked pretty well.
But there is no featured can auto collecting the tabs in same type.
The feature like the AutoGroup plugin .
May you add this feature in grouping workspace automatically instead of manual operation?
This feature can improve our performance at work.
Thanks a lot. :)

It works well. Thank you. Very helpful.

"it loads ALL your tabs" mentioned by other person means;
- Assume that
- Some tabs in workspace A and some other tabs in B
- Workspace A is active at present
- I'd like to switch to workspace B. I'll do it.
- Again I'd like to switch back to workspace A. Then all tabs in A are re-loaded.
The expected behavior is, just to switch back to workspace A without reloading, like Tab Groups.

First, as another user has mentioned, it doesn't play well with container tabs. I have to uninstall it for that reason. The other issue is that when you switch between workspaces, it loads ALL your tabs.

Good start, though. I'll check back later.

Still a ways to go before it's a replacement for Tab Groups/Pandora.

While it does seem to remember and re-open the tabs as documented, it seems unaware of the containers the tabs were opened in as the URIs are opened in the 'default' container regardless of where they started. That's a pretty huge problem (if not a deal-breaker) if you're using containers.

Additionally, you can't see what tabs are logged to a workspace and there's no search facility. Neither of these is an explicit deal-breaker but they are limitations you have to plan around, especially if you have a lot of tabs to keep track of for any length of time.

re v1.1.1 Almost! Container awareness works nicely but switching between workspaces doen't close tabs properly.