Resource Loading Tests

Controlled pages for measuring which first-party resources AI clients request after fetching HTML.

Use a unique attempt id in the URL, for example /lab/resources/css-stylesheet?id=resource-001.

• CSS Stylesheet Resource - Checks whether a client fetches a first-party stylesheet after reading HTML.
• PNG Image Resource - Checks whether a client fetches a first-party PNG image without assuming OCR.
• SVG Image Resource - Checks whether a client fetches a first-party SVG image separately from PNG images.
• Script File Resource - Checks whether a client downloads a script file without treating download as execution.
• Script-Initiated JSON Fetch - Checks whether a client executes JavaScript deeply enough to request first-party JSON.
• Font File Resource - Checks whether a client fetches deeper render resources such as fonts.