XF 2.2 Style errors but only with Firefox

[grantus]

Everything has been fine until recently (I didn't make any changes recently) when I get this console error in Firefox:

Layout was forced before the page was fully loaded. If stylesheets are not yet loaded this may cause a flash of unstyled content. 
The resource at styles/fonts/fa/fa-regular-400.woff2?_v=5.15.3 preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. 
The resource at styles/fonts/fa/fa-solid-900.woff2?_v=5.15.3” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly. 
The resource at styles/fonts/fa/fa-brands-400.woff2?_v=5.15.3” preloaded with link preload was not used within a few seconds. Make sure all attributes of the preload tag are set correctly.

I don't see any errors in the Network tab. I've had other users experience the same issue. The page doesn't load the stylesheet properly so the page is broken. It happens completely at random and it's fine when I refresh. It even happened to me in the AdminCP!

Does anyone know what could be the issue?

 

[jeb35]

Does it happen with any other browser? If not, then disable all extensions and see what happens. I barely use Firefox anymore due to its various issues with websites.

 

[grantus]

Does it happen with any other browser? If not, then disable all extensions and see what happens. I barely use Firefox anymore due to its various issues with websites.

So far it's only happened in Firefox. I'm disabling addons but it's hard to tell since it's so random. Sometimes it happens a few times in one day, then not for another few days.

 

[Mr Lucky]

I barely use Firefox anymore due to its various issues with websites.

Me too. Firefox may be the new Opera. I remember years ago when you had to do a different css thing just for Opera. I recently found a similar thing with Firefox.