I just today noticed all text on webpages and system menu bars are deteriorated, not clearly formed. Even large font bold text is similarly affected. The font of this message hopefully displays what I am saying about the problem. I have opened the same pages of different websites and the same problem exists. I also opened the same webpages on both Chrome and MS Edge and this issue was not present.
Can you attach a screenshot?
- use a compressed image type like PNG or JPG to save the screenshot
You can try to disable hardware acceleration in Firefox.
- Options/Preferences -> General: Performance
remove checkmark: [ ] "Use recommended performance settings"
remove checkmark: [ ] "Use hardware acceleration when available"
Close and restart Firefox after modifying the setting for changes to take effect.