to fix this issue:
change the "bidi.edit.delete_immediately" from about:config to "true"
https://bugzilla.mozilla.org/show_bug.cgi?id=1034337
to fix this issue:
change the "bidi.edit. delete_ immediately" from about:config to "true"
https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=1034337