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Pages suddenly changed to dark fonts on pages that have dark background

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After the last update I have pages that will not display white or light fonts on a dark background. Using either the system Dark Theme or a dark Firefox theme, neither display white fonts on dark backgrounds - this includes pages like the Google search results, all of the incidental text like "did you mean to type X" is black. Websites that I was looking at this morning were all fine, then I restarted Firefox a few hours ago, an update ran, now its all messed up.

I have tried messing with the 'force websites to use the above fonts' etc, but nothing is helping. Even when I switch to the light theme pages like the below will not display properly.

Secondly, when I try to login to support here using my regular Firefox acct, I keep getting an error that says my acct is already associated with another login and it won;t let me post in sup[port - however, syncing etc. works fine, so I had to create this temp acct to post this.

Thanks

After the last update I have pages that will not display white or light fonts on a dark background. Using either the system Dark Theme or a dark Firefox theme, neither display white fonts on dark backgrounds - this includes pages like the Google search results, all of the incidental text like "did you mean to type X" is black. Websites that I was looking at this morning were all fine, then I restarted Firefox a few hours ago, an update ran, now its all messed up. I have tried messing with the 'force websites to use the above fonts' etc, but nothing is helping. Even when I switch to the light theme pages like the below will not display properly. Secondly, when I try to login to support here using my regular Firefox acct, I keep getting an error that says my acct is already associated with another login and it won;t let me post in sup[port - however, syncing etc. works fine, so I had to create this temp acct to post this. Thanks
Attached screenshots

All Replies (3)

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Did this just start today? Do you use the Facebook Container add-on? Version 2.3.3 had a bad style sheet so they quickly released version 2.3.4 to resolve this. Firefox should find it on a routine check, but to speed that up:

Open the Add-ons page. Either:

  • Ctrl+Shift+a (Mac: Command+Shift+a)
  • "3-bar" menu button (or Tools menu) > Add-ons
  • type or paste about:addons in the address bar and press Enter/Return

In the right side, below the search box, there is a gear/wheel icon. Click that icon to drop the menu and then click "Check for Updates" to trigger an update.

Alternately, click Facebook Container to show its Details panel, scroll down below the description, and click "Check for Updates".

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You're a genius, that worked great!

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Thank you for reporting back, and it was a tip from another user, an unnamed genius, that made it possible.