Black Rectangle Seen When Pointin At Buttons

[TWPonKubuntu]

Out of interest, If I install some of the other Firefox themes from the repository, can they be uninstaled, or, are they in place permanently?

Thanks

This thread addresses adding and removing themes. I've never bothered to remove a theme, but it appear to be a simple process using either muon or apt-get.

[anonprivate]

Plasmazilla is a plasma support library for Firefox and Thunderbird.

https://github.com/plasmazilla

It does not appear to have been updated recently. I don't use it, so I cannot advise, either way, on using it.

Thank you