Hi, I have an odd problem with a friend's Firefox and Thunderbird on Windows. The font changed to white in the address bar, the tab titles, some content on websites, some elements of the settings etc. From what I can see there is no difference to my settings under "Language and Appearance". When I create a new profile either with the profile manager in Firefox or by renaming "%appdata"\Mozilla Firefox", nothing changes. So I can rule out a custom userchrome.css or similar in the profile folder. When I switch to "troubleshoot mode" with the old or the new profile, everything looks fine. It also affects Thunderbird, but no other programms. I can't figure out, where the problem lies.