Great Addon. Very easy to create his own theme.

This is a an easy to use tool for nearly complete customisation and it's well worth it. The only thing that could've made this better is a larger file size limit for background pictures (so i could toss literally anything on it lol). Windows Paint is enough to make a fun background to add to the colors though, and the files are small enough that I haven't had any trouble.

The customization is very good. The only unfortunate thing about it is that I can't find any way to apply it.

Amazing, would love to have the ability to have a dark new tab page similar to the classic firefox dark theme

What a delightful way to customize my web experience.