This still causes issues for me from time to time with a dark GTK theme + Firefox on Linux. Developers like to set the default color to something like #222 and

This still causes issues for me from time to time with a dark GTK theme + Firefox on Linux. Developers like to set the default color to something like #222 and leaving the background as default, or unreadable black on black. Mozilla also still lets you set different defaults if you want. People shouldn't assume a default background color and if you want white, set it to white.