I'm posting this through Chrome but when I D&D beyond on Firefox (which is what I mainly use) the text for feature descriptions, Spell description, Monster descriptions, and forum posts don't show up at all. 

I've tried clearing the cache but that did not fix the problem, nor did deactivating my ad blocker.

I also use the Beyond20 and VTTES plugins but these haven't been a problem before so I don't believe they caused the problem.

Those plugins might be causing the problem if they (or DDB) were recently updated. Try turning them off and see.

I turned off my adblocker again and it worked this time, I must have forgot to refresh the page when i did it the first time.

Thank you for the help.

Happy to help.