Close + save the tabs you don't need at the moment. A lightweight solution to the problem of too many tabs.
To keep the number of open tabs small, we need a quick way to temporarily close and restore them. This extension lets you do that — you can "stash" tabs in the extension popup. It's basically the simplest possible session manager.
Like bookmarks, stashes are synced across devices via Chrome's built-in mechanism.
Source code: https://github.com/ivan7237d/stash-tabs