Show: Tab Manager & Session Saver Firefox extension - named tab workspaces with local-only storage

Sharing a small project: a Firefox WebExtension for saving and restoring named tab sessions. The core use case: working across multiple client projects and wanting to switch tab contexts quickly. Chrome has tab groups; Firefox doesn’t. Named sessions are a different workflow but solve a similar problem. Tech: manifest v2, uses browser.storage.local for all persistence. The session list is a JSON array of {name, tabs: [{url, title}]}. Free, open source, live on AMO.