Firefox Theme

The Firefox theme tends to be somewhat unstable. As long as you have the most recent release of Firefox there shouldn't be many issues, but if you use the beta version of Firefox or your distribution is slow to update Firefox there may be some issues. Firefox nightly or ESR versions will likely have a lot of issues with this theme. I recommend using the Snap or Flatpak version of Firefox to get the best experience, but this is by no means a requirement.

You can also optionally make it so the theme doesn't apply to the settings pages in Firefox. This is because the settings themes can be slightly buggy. You will be given the option to do this while configuring the theme.

Some extensions may be broken by the Firefox theme. The theme does support the container tabs extension though.