Tab Kit makes tabs more efficient for power users, allowing a wide variety of tweaks, all of which are optional, notably: - Group tabs, by domain or opener (parent) tab, manually or automatically - Vertical tab tree (with splitter), like Tree Style Tab - Multi-row tabs - Sort tabs, by address, last loaded, last viewed, order of creation, origin or title - Control new tab position and close order -
![Tab Kit :: Add-ons for Firefox](https://cdn-ak-scissors.b.st-hatena.com/image/square/1d00238c44546c764df437f052467466dd948594/height=288;version=1;width=512/https%3A%2F%2Faddons.cdn.mozilla.net%2Fuser-media%2Fpreviews%2Ffull%2F15%2F15609.png%3Fmodified%3D1530208346)