- by Jani, 3 years agoRated 1 out of 5Validating frames is no longer possible with the new version when using Firefox. Hopefully, the feature will be recovered, otherwise this expansion will be of no use.
Developer responseposted 3 years agoThe same extension works in Chrome. There is a missing feature in FF to have this working. See https://gitlab.com/mgueury/html_validator/issues/11. Feel free to vote for the FF bug.