TabHamster is a session manager and tabs saver add-on for Chrome. It allows users to save open tabs in groups, which are stored in the sync Chrome storage. By signing in to the browser, users can access their tab groups on other PCs. Users can assign a group name, edit, add new tabs, delete, and move the group from the list.

In addition to tab groups, TabHamster also provides a session manager for quick and convenient access to the latest browser sessions. Users can access the currently open and earlier browser sessions, and recover any session with just one click.

It's worth noting that while tab groups are synchronized across devices, sessions are not synchronized. TabHamster offers some useful tips, such as quickly saving all open tabs in a group by opening the extension window and pressing "ENTER", and opening tabs in a new window by "Ctrl + click" on the group name or session.

TabHamster is a free add-on developed by Mykhailo Onikiienko. The source code is available on GitHub for those interested in exploring it further.