So if I'm reading this right, it sounds like you were expecting "Stash all tabs" to stash only the tabs matching the search. That's a fair point; I've made a note to look into this further.

I'm afraid I don't really understand the rest of your post, though, because:

- When Tab Stash hides/stashes tabs, it's not going to use any more resources than before (i.e. your memory usage will stay the same or decrease), so I don't really understand why the rush to free up memory?

- There IS a single-click "undo" for an accidental "stash all tabs", which is to simply unstash the group that was created.

- You can select multiple tabs at once by shift+clicking, just like you would in Windows Explorer or Finder. There's no need to select each tab individually. (And yes, this respects filtering, so you can select an entire list of filtered tabs with one click and one shift+click.)

Anyway, I hope this helps, and if you'd like any more help, feel free to open an issue on GitHub!