We're pleased to announce that the SiteVitals AI Audit extension for Firefox has been approved and is now available on the Mozilla Add-ons store.
Install it here → addons.mozilla.org/addon/sitevitals-ai-audit
What it does
The extension adds a toggleable side panel to any webpage and runs an instant AI readiness audit — entirely in your browser, with no data sent anywhere.
Click the toolbar icon and a slim tab appears on the right edge of the page. Open it and you get a full report covering the signals that matter to AI search engines, crawlers, and language model citation systems:
- Meta basics — title tag and meta description length, canonical tag, noindex detection
- Social tags — Open Graph and Twitter Card completeness
- Structured data — JSON-LD type detection,
@idgraph linking,sameAs,knowsAbout,speakable - E-E-A-T signals — author and publisher
sameAschains - AI citation targeting — FAQPage and QAPage schema
- Content structure — H1 count, heading hierarchy, Q&A heading ratio, paragraph density for AI extractability
- Accessibility signals — image alt text quality, link anchor text (flags generic text like "click here")
- Semantic HTML —
main,article,nav,header,footer,section,time,figure,table,blockquote - llms.txt — reminder to check if one is in place
The interaction model is designed to be fast and direct: hover over any element for inline feedback, click any warning in the panel to scroll to and highlight the offending element on the page. It will highlight paragraphs of text that are considered 'thin', to 'dense' or 'just right' - Goldilocks paragraphs.
Click the toolbar icon again to remove the panel cleanly with no trace left on the page.
Why we built it
AI search is changing what "a well-optimised page" actually means. The traditional SEO checklist — title tags, meta descriptions, backlinks — is necessary but no longer sufficient. Language models and AI-powered search engines are evaluating pages differently: they're looking for structured data, semantic markup, clear authorship signals, and content that's easy to extract and cite.
Most tools don't surface these signals in a convenient way. The extension puts them right where you need them — on the page, in context, in seconds.
It's also completely standalone: all audits run in your browser with no data collected or transmitted to any server. It works on any page you visit.
Who it's for
- Developers building or reviewing pages and wanting immediate structural feedback as they work
- SEO professionals auditing sites for AI search readiness alongside traditional on-page factors
- Content teams who want to understand whether their pages are structured in a way that AI systems can parse and cite
- Agencies doing quick pre-call reviews of client sites without needing to log into a separate tool
Getting started
- Install the extension from the Firefox Add-ons store
- Navigate to any webpage and click the SiteVitals icon in your toolbar
- A tab will appear on the right edge of the page — click it to open the audit panel
No account needed. No setup. Just install and start auditing.
What's next
The Firefox release is the first step. We're working on a Chrome version and have more browser tooling planned. If there are specific checks or workflows you'd like to see in future updates, let us know.
Articles written collaboratively by the SiteVitals team.
