This started happening when the new firefox update happened yesterday/today that revamped a lot of things in firefox.
I cannot see the Notifications, Inbox, Bookmarks, Account Options next to my Name in the top right of the forum page.
Also, I cannot see the agree Smiley or the Awesome Heart on other forumer's reactions in posts. I see their avatar image, just not their reaction.
Nor the icons for the flag, quote, agree, awesome options on people's posts.