Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Some sites (Yahoo mail, Facebook and others) have suddenly become flickering, with a lot of content missing.

  • 2 replies
  • 3 have this problem
  • 7 views
  • Last reply by FredMcD

TeodoraP
TeodoraP
more options

All of a sudden, some websites have become flashy, flickering, with text and everything else appearing and disappearing as I move the cursor, which makes it impossible to navigate. I attached the error I get on Yahoo mail, for example. I tried opening Mozilla in Safe Mode, which solved the problem, but I returned to the normal mode because I need Adblock and other stuff and the problem returned. I also did a Mozilla refresh, which didn't solve the problem. Still, I don't get where it's coming from, since I didn't install anything new and I use it in the same way I did for the past many years. If I turn to Chrome, for example, everything works fine, so it's clearly a browser issue.

All of a sudden, some websites have become flashy, flickering, with text and everything else appearing and disappearing as I move the cursor, which makes it impossible to navigate. I attached the error I get on Yahoo mail, for example. I tried opening Mozilla in Safe Mode, which solved the problem, but I returned to the normal mode because I need Adblock and other stuff and the problem returned. I also did a Mozilla refresh, which didn't solve the problem. Still, I don't get where it's coming from, since I didn't install anything new and I use it in the same way I did for the past many years. If I turn to Chrome, for example, everything works fine, so it's clearly a browser issue.
Attached screenshots

All Replies (2)

TeodoraP
TeodoraP Question owner
more options

I forgot to mention that the problem is intermittent, because now I can open a site with this problem and after a few minutes I open it again and it's fine. It depends.

FredMcD
FredMcD
more options

Check your zoom controls.

<Control> (Mac=<Command>) + (plus) enlarge - (minus) reduce 0 (zero) restore

If this fixes the issue; It appears to be an issue that only affects users who have turned off ClearType font rendering within their windows settings. So a workaround for the moment would either be to turn ClearType back on or disabling hardware acceleration in Firefox: Firefox's performance settings How to Tweak ClearType in Windows for Better Screen {web link}

Bug 658763 Missing text when ClearType is forced via DirectWrite rendering-mode prefs but disabled in Windows