Detect Priority Hints
Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.
Detection looks at dom selectors across 1 fingerprint rules among the site's public responses.
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Websites using Priority Hints
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Signal classes
PluginView evaluates public page signals in these classes when identifying Priority Hints. Individual fingerprint rule bodies are proprietary and are not published.
- DOM selectors
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Example public indicators for Priority Hints
Illustrative indicators derived from public catalog metadata for Priority Hints. A live scan may match additional proprietary rules beyond these examples.
- iframe, img, script, link
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What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Priority Hints signature (1 rules) at the time of the scan.
- Does not establish
- A sitewide install of Priority Hints, an active vendor contract, exclusive use, or that Priority Hints is still in place today.
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How to check a site for Priority Hints
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Priority Hints signals.
- 2. PluginView reads only public responses (dom selectors) and scores them against the Priority Hints signature set (1 rules).
- 3. Review the confidence score and text explanation for Priority Hints on the results page.
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FAQ: detecting Priority Hints
- Can PluginView detect Priority Hints without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Priority Hints — typically dom selectors. It does not bypass authentication or paywalls.
- What category is Priority Hints?
- Priority Hints is classified under Performance in the PluginView directory.
- How many fingerprint rules cover Priority Hints?
- This reference currently tracks 1 fingerprint rule across dom selectors. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Priority Hints?
- Illustrative public indicators for Priority Hints include iframe, img, script, link. A live scan may match additional proprietary rules beyond these examples.
