i would like to know from the answering members did they tried themself? if working for them why dont they post a working screenshot ??

I've investigated the Facebook messenger problem and it is definitely broken. I talked with a lot of people about it and it turns out that Facebook is to blame here.

They broke something on their website which sends the buttons to Firefox. Whatever they did, they didn't test it to make sure FB messenger was working on Firefox. We have to wait for them to fix it and we know how Facebook can take its sweet time fixing something. :/

I'll see if someone from Mozilla can find an actual person at Facebook and escalate this issue and get it fixed. If anyone sees it get fixed, please let us know here. Thanks.

Also I'm just a volunteer here and don't work for Mozilla.

shiiit, it's impossible to contact Facebook support team from facebook :(

And unfortunately it still doesn't work. How much time does facebook need to fix the problem?