Quote never work in Firefox if some Emoji are present

[PeopleInside]

I received a report that in Firefox if a text with Emoji in the middle is select than is used "quote" the text after the smiles are not quoted.

I tested this in Firefox stable and developers and the issue is present.
Is not present in Chrome based browser.

I was thinking to report this bug to the WebCompat but there is no demo about this that they can test for reproduce the issue.

Also I tried to reproduce the issue with "normal Emoji means with no extension" and I was unable to reproduce the issue on Firefox. So the issue is the Firefox browser or the extension? How can we report the bug if is a browser bug?

https://www.screencast.com/t/usihW1Pyr0kZ
https://www.screencast.com/t/eEQUbZvL

[clarkwinkelmann]

I'm going through my unread notifications and I just wanted to report that I've seen this report, and I think I've added feedback to the one on the forums.

However I really have no idea what the problem could be and no time to investigate.

If anyone can provide more intel or a reliable small dataset guaranteed to reproduce I'll take a look again.