Issue: Missing fonts in Firefox

[Starry Windy]

Well, I think I have had this problem for days. When I'm browsing using Firefox, sometimes the fonts in the themes that I'm using is missing for some weird reason, for example, when I'm using Color Flattered X as shown right here:

Spoiler:

Besides of this, sometimes the section's title shown in the main page (like The Mall, Anime and Manga among others) has their font missing and rendered as blank too. This is strange, because it has never happened to me before in a few weeks ago, and I'm using Firefox 45.0 at this time.

Um, I'm wondering if all of you have any ideas about this problem, and how to fix it?

 

[Starry Windy]

Well, I have tried to change the default font yesterday, but...

It seems that the problem still persist.

 

[Starry Windy]

Um, even emptying the cache won't do as well, since it occurs at random times.

 

[donavannj]

Um, even emptying the cache won't do as well, since it occurs at random times.

Try clearing it anyway.

 

[test_account]

I have tested this and I'm not able to duplicate your problem.. has to be something on your end..

 

[Starry Windy]

I guess so, probably it's because one of old add-ons that I was using back then which breaks stuffs in latest Firefox. I have disabled it and there are no more issues, for now.

 

[Mewtwolover]

I got the same problem with the Forever Standing theme. Checked Firebug if there's something wrong in the site and it showed this message twice:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://fonts.gstatic.com/s/opensans/v13/cJZKeOuBrn4kERxqtaUH3VtXRa8TVwTICgirnJhmVJw.woff2. (Reason: CORS header 'Access-Control-Allow-Origin' missing).