Hi, thanks for the review and sorry to hear you're having trouble with performance. There was an issue in older versions of Tab Stash that could cause high background CPU usage, but I'm surprised to hear that it's happening in recent updates as well and that it's recurring even after reinstalling Tab Stash. Would you mind opening a bug on GitHub so I can troubleshoot with you further?

https://github.com/josh-berry/tab-stash/issues/new/choose

Thanks!