As Dario said, it doesn't make sense to use the GTK theme on web pages.
In addition to this, there is *already* a setting for not using the
system colours:
Edit > Preferences > Colors > Use system colors
I believe it is off by default and obviously should prevent the system
colour scheme from det
For what it's worth, there is a very clean workaround in the ArchWiki:
https://wiki.archlinux.org/index.php/Firefox#Unreadable_input_fields_with_dark_GTK.2B_themes
I had seen some other userContent.css "fixes" that didn't get everything
or overrode too much, breaking legit stylesheets, but this s
