How do I make fonts display properly?

My project stopped displaying fonts in preview and export all of a sudden. It was showing the fonts fine a few days ago but today I checked my exported game and it was not the fonts at all. I tried to check my project file and the preview does not display fonts either. But no changes were made to the project and it was working fine before.

This only happens in Firefox, it works fine in Chrome.

What system are you using to change the fonts? If you're not using SpriteFont, you should really use SpriteFont. It's a mission to go through your project and change everything, but it'll be worth it in the long run when you save time when it comes to these sorts of problem.

What system are you using to change the fonts? If you're not using SpriteFont, you should really use SpriteFont. It's a mission to go through your project and change everything, but it'll be worth it in the long run when you save time when it comes to these sorts of problem.

I am using the 'Text' object and a Calibri as my font.