Tabcove backs up every window and tab on its own, so a crash, an update restart or an accidental "close all" never loses your work. Save named sessions, restore a whole session, one window or just the tabs you tick (lazily, so 200 tabs come back in seconds). Keeps pinned tabs and tab groups. No account, no cloud, no analytics: everything stays in your browser. Free for 5 sessions and 24 h of backups; Pro is a one-time $9.99. Open source (MIT).
