It does the job, but as someone that uses vertical tabs on the left, I kinda hate the fact that the space switcher is in the top right of the browser. I came from Arc Browser and it's managed perfectly well there —only reason I'm back to Mozilla is becasue Windows support from the company is very bad in Arc and it's working very bad lately—.

desperately needs support for keyboard shortcuts. need the ability to custom order workspaces instead of just sort alphabetically. other than that its really good.

Very nice and usefull, it reminds tabs after closing, and can manage it with the native mozilla groups, just add please shortcuts and correct a bug that sometimes idk why when closing it moves some tabs from one workspace to another.. , but before closing it works perfect

do not work after restarted browser and also after closing window

If you close the browser it didn't remember the tabs that were open. I wish that it would have a feature that let's you change workspaces with keyboard shortcuts.