Just wanted to provide a little bit of context. This extension is NOT for everyone.<p>It fulfills a very specific purpose. I have found that I constantly have way too many tabs open. I often click new links to open new pages without closing out older tabs, and it was getting crazy. Somedays I would have 30-40 tabs open.<p>I wrote this extension so that I could keep a cap. You pick a maximum number of tabs an algorithm (least recently used, least accessed, or oldest) and as soon as you hit the cap it will discard an older tab.<p>It will never close a pinned tab or a tab that you have never been to (never been to means you haven't been actove on the page for more than 3 seconds)<p>The source is available on Github here: <a href="https://github.com/ccampbell/xtab" rel="nofollow">https://github.com/ccampbell/xtab</a>