Hello, It seems that the recent Change[1] about the relocation of the hunspell dictionary files from /usr/share/myspell/ to /usr/share/hunspell/ broke spell-checking for Firefox. See https://bugzilla.redhat.com/show_bug.cgi?id=2041930#c10 for some more details. 1. https://fedoraproject.org/wiki/Changes/Hunspell_dictionary_dir_change
*** This bug has been marked as a duplicate of bug 2084538 ***