Rocket Validator HTML Guides

Adds links to HTML validation guides next to each issue in the W3C Validator and validator.nu.

Adds quick-access links to HTML validation guides and curated references next to each issue in the W3C Validator and validator.nu. HTML issues returned by the W3C Validator can be a bit cryptic, as they lack a help guide explaining the nature of the issues and how to fix them. This extension enriches each reported issue with helpful links: - Rocket Validator HTML Guides — direct match on the extensive Rocket Validator guides library, which also references MDN, the HTML Spec, W3C, web.dev, Can I Use and other authoritative sources. - Search engines — one-click lookup of the issue on the major search engines. - AI assistants — ask ChatGPT or Mistral to explain the issue or suggest a fix. No setup or registration needed to use this free extension.