Will be up at https://addons.mozilla.org/addon/matte-black-v2/ once it gets approved.
Sorry for the late response.

I would really appreciate it if you would check out my dark theme for Google Searches
https://addons.mozilla.org/en-US/firefox/addon/dark-theme-for-google-searches/
It's in constant development so if you see something that doesn't look right, please send me an email!