Detect Cloudflare Rocket Loader
Cloudflare Rocket Loader is responsible for prioritising over website's content by delaying the loading of Javascript until rendering.
Detection looks at javascript globals across 2 fingerprint rules among the site's public responses.
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Websites using Cloudflare Rocket Loader
Loading website list…
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Signal classes
PluginView evaluates public page signals in these classes when identifying Cloudflare Rocket Loader. Individual fingerprint rule bodies are proprietary and are not published.
- JavaScript globals
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Example public indicators for Cloudflare Rocket Loader
Illustrative indicators derived from public catalog metadata for Cloudflare Rocket Loader. A live scan may match additional proprietary rules beyond these examples.
- __cfQR.done
- __cfRLUnblockHandlers
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What a detection means
- Establishes
- One or more public signals on the scanned page matched a known Cloudflare Rocket Loader signature (2 rules) at the time of the scan.
- Does not establish
- A sitewide install of Cloudflare Rocket Loader, an active vendor contract, exclusive use, or that Cloudflare Rocket Loader is still in place today.
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How to check a site for Cloudflare Rocket Loader
- 1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest Cloudflare Rocket Loader signals.
- 2. PluginView reads only public responses (javascript globals) and scores them against the Cloudflare Rocket Loader signature set (2 rules).
- 3. Review the confidence score and text explanation for Cloudflare Rocket Loader on the results page.
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FAQ: detecting Cloudflare Rocket Loader
- Can PluginView detect Cloudflare Rocket Loader without logging in?
- Yes. PluginView only reads publicly accessible responses when checking for Cloudflare Rocket Loader — typically javascript globals. It does not bypass authentication or paywalls.
- What category is Cloudflare Rocket Loader?
- Cloudflare Rocket Loader is classified under Performance in the PluginView directory.
- How many fingerprint rules cover Cloudflare Rocket Loader?
- This reference currently tracks 2 fingerprint rules across javascript globals. Individual rule bodies are proprietary and are not published.
- What public signals suggest a site uses Cloudflare Rocket Loader?
- Illustrative public indicators for Cloudflare Rocket Loader include __cfQR.done; __cfRLUnblockHandlers. A live scan may match additional proprietary rules beyond these examples.
