Why doesn't it tune the color of the status panel?

there is an error when i try to load a theme i have made other than that it is great!

ブラウザーの色を変えられて、好きな色で作業ができるのはいいが日本語に対応していないので、使い方側時からないところがあった

I liked this extension. But the custom theme file which exported by the extension doesn't work. The .xpi file is identified by Firefox as corrupt.

great extension. wish it had more high contrast choices.