Firefox enter before certain characters doesn't move cursor to the new line

[craigengland]

Screen.Recording.2021-04-23.at.13.29.32.mov

When typing the first line and I press "Enter" the cursor and the final ' follow me down to the next line.

In my second example when pressing "Enter" before the ?, a new line is created however the cursor doesn't follow me in this scenario.

I have tested in Chrome and Safari and all works well on those browsers so I am guessing it has something to do with the firefoxNewLineFix function that intercepts the "Enter" key and adds a new line.

[antonmedv]

Yes, firefox is really buggy with contenteditable. A few bugs 4-5 y/o in firefox bug queue.
Please, take a look at one of PRs. I think we have a fix there, but I still don’t have time to take a look at it.