I just saved a window with 12 tabs, and now I can't open them back up! Beware of this buggy extension. I can still see the saved window in the extension's menu, but clicking the button to restore the window doesn't do anything.
Maybe allow us to export/import the list of tabs in a saved window as a block of text with a URL per line, so that I don't lose my tabs when this app decides to be buggy like this!
EDIT: It looks like you can open the saved tabs in the current window by clicking on each tab listed, so there is a work around for this broken restore button, but still not polished and very annoying.
This addon idea nice but it's very bare bones and seems to have a few bugs like Runafuru said (comment below). It would be nice if you could list all the tabs and be able to open one or more of them instead of all or none. It would be also nice to be able to edit the saved tabs to remove them or re arrange them inside the group or move them from one group to the other. It would be nice to be able to see their favicon and url of the saved tabs.
BTW I wanted to contact you trough the issues section of github to have a better conversation about this but it seems like your repository does not have one it only has pull requests.
Thanks for your feedback - I tried to replicate this behaviour but wasn't able to. I appreciate it's almost a year gone by now, but if this is still happening could you pop over to https://github.com/tabsleeper/tabsleeper-extension and open up an issue and we can try to figure out what's happening