Kit [For Vertical Tabs]
A vertical tabs theme that looks like Kit, Firefox's new refreshed brand mascot and companion. This is supposed to be used with vertical tabs and it might look weird with horizontal tabs. A version for horizontal tabs can be found on my profile.
![Kit [For Vertical Tabs] のプレビュー](https://addons.mozilla.org/user-media/version-previews/full/4076/4076887.svg?modified=1774908722)