About Tab Session Manager
Tab Session Manager, by the developer Sienori, saves the state of your browser windows and tabs and lets you bring them back later. It can save automatically as you browse, so a crash or an accidental window close does not cost you a research session, and you can name and save sessions by hand, for example one per project.
It is free, with its code on GitHub under MPL-2.0, and it runs on Chrome, Firefox and Edge. The Chrome build uses Manifest V3, and version 7.4.0 was published in July 2026. Firefox shows about 172,000 users and the Recommended badge. The developer takes sponsorship through Patreon and PayPal.
Privacy is straightforward. The privacy policy says sessions and settings stay on your device unless you turn on cloud sync, which is opt in and stores sessions in your Google Drive app folder, unreadable by other apps and the developer according to the policy. The policy dates from 2020, does not explain the permissions and mentions no analytics. This is a save and restore tool, so pair it with a suspender if memory is your problem. For a safety net under your tabs, it is the one to start with.
Pros and cons
- Saves and restores windows and tabs, with automatic saving
- Free and open source (MPL-2.0), with no account needed
- Works on Chrome, Firefox and Edge, with Manifest V3 on Chrome
- Cloud sync is optional and goes to your own Google Drive app folder
- Chrome rating is 3.5 from 451 ratings, lower than the Firefox rating
- Cloud sync works only through Google Drive
- It saves sessions but does not suspend tabs or free memory
Permissions
It asks to read your tabs and store data, plus downloads for exports, identity for optional Google sign-in, and alarms for timed saves. Tab groups is an optional permission on Chrome.
