It seems to be inverted to normally being no word wrap and going in to edit enables it so it looks normal.
Before editing: https://files.catbox.moe/dv0j5b.jpg
After hitting edit: https://files.catbox.moe/3kbu5x.jpg
Clear your cache and try again. You probably tried when I was pushing the update.
No more issue at all for me now.
Normal viewing looks perfect. Hitting edit looks perfect. Previewing an edit looks perfect.
Thank you very much for digging into this and working it out to get it to display on Waterfox properly!
Glad to help.
It was working fine on other browsers though. :)
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