Start with the required output
Write down the fields or page content your application needs. Inspect the initial HTML: if it already contains those values, HTTP may be sufficient. If the values appear only after page execution or interaction, test browser mode.
JavaScript on a website is not itself a reason to use a browser. Some pages ship data in HTML or embedded JSON. Conversely, an HTTP success response can contain only an application shell with none of the requested records.
- Choose a small sample including typical, empty, and changed pages.
- Fetch the sample using HTTP and inspect the returned payload.
- For missing dynamic content, test browser mode with supported waits.
- Compare completeness, public errors, latency, and returned charge metadata.
Wait for meaningful content
With a dynamic catalog, monitoring a visible product container is typically more pertinent than tracking a generic page-load event. Apply the waits defined in the request contract and set a timeout. Be aware that a page may maintain background connections even once the content is delivered.
Check for empty-state and challenge pages as well as successful records. Record why a request failed so retry policy can distinguish transient failures from an invalid URL, schema, or access requirement.
Separate execution from egress
HTTP and browser describe acquisition behavior; residential options change the egress route. Start with auto when you want the service to select a suitable route, then use measurements to justify a more specific mode.
Do not compare modes solely by the base price. A route that returns unusable content creates downstream rework. Use billing metadata, valid-result counts, and a consistent sample when assessing a workflow.