Several months ago, the Like and Comment parts of MakeUseOf’s page stopped working for me. Was this on purpose, or is it a bug I’m having? Thanks!
You have been banned, perhaps you violated their policies, get in touch with them.
If only happens on MakeUseOf page, maybe you're banned. Get in contact with them and find out.
If you are facing this problem with all liked FB pages - disable all Firefox add-ons and try to Like/Comment again. Now - enable add-ons one by one and find out which one causes the issue.