I encountered an issue using PureBrowser (and FireFox) with dark mode in Linux. I encountered this in both GNOME and Plasma:
Perhaps some of you are aware of this already, but I was unable to find the solution here, so I’m sharing. It involves adding a custom config to about:config:
A much better look, indeed!
Considering the simple nature of this fix, can it be made part of PureOS default config? This was my biggest annoyance with my switch to Linux, because it seemed that with the rest of the system being so well polished, something as simple as form element formatting to be broken was silly.