Hi Eddie. I can't tell what's wrong from the attached screenshot. Is that the file you intended to attach, since it doesn't seem to show a Firefox vs Edge comparison, unless I'm misunderstanding? To help determine if this is some sort of corruption in your Firefox profile, it would help if you could create a new, fresh profile and see if the problem still occurs with that: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles If it does not, it would be very helpful if you know of any publicly accessible pages that have this issue which would make it much easier for the developers to investigate and diagnose.