The Times Crossword black background has gone missing - why?
What is bizarre about this fault is that the black background is replaced by the web page last looked at..eg: where I have five tabs in a window, one of which is The Time Crossword say tab No 3 - and I then look at tab No 5 and revert back to tab No 3, the background [where normally the black will appear] uses the tab screen of tab No. 5
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consider creating a FRESH firefox profile, compare results
Try to disable hardware acceleration.
- Firefox > Preferences > Advanced > General > Browsing: "Use hardware acceleration when available"
Unfortunately neither of these two strategies work. Do you have any other ideas?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
- Don't make any changes on the Safe mode start window.
- https://support.mozilla.com/kb/Safe+Mode
Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See: