Comment 121 for bug 220263

I hit this bug today by choosing the dark Adwaita theme in Gnome 3.28 and Firefox 65.0. It's amazing that this is an 18 year old bug. I found it surprising the system theme did anything to webpages and had two consecutive surprises:

- First setting the system theme to Adwaita-dark changed the Firefox theme. That makes sense. What was surprising was that the Firefox theme then changed the content of the web pages. My mental model of a browser is that within the page view it's a different world and there's no reason for the web to look different to match the browser chrome or the system theme.
- Because I didn't actually like the dark version of Firefox I switched it to the Light theme manually (webpages are usually light colored and so dark chrome in browsers looks weird). And yet even after doing this pages still had dark buttons and input areas. That was even stranger. Now Firefox had a light theme and yet the webpages were still picking up broken colors from the system theme inconsistent with the Firefox chrome theme.

I fixed this after some web searches by setting "widget.content.gtk-theme-override:Adwaita". That at least sets a light theme for UI controls and is back to looking reasonable. I found that in bug #1283086 which seems to be a 3 year old duplicate of this 18 year old bug. The proposal for removal of all native theming in #1411425 makes perfect sense.