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Practical guides to browser extension projects and website measurement, with examples you can use in your own work.

Choose a guide for your next decision: compare buying or building an extension, prepare a development brief, or check the path from a form event to an accepted enquiry. Each guide includes a worked example and a practical next step.

GA4 records a form submission. Was the enquiry accepted?

Follow validation, server acceptance and a retry with the same ID. Learn why six attempts can produce two unique records, while email delivery remains unknown.

Practical guide · worked example with code

Check the enquiry path

Buy or build a browser extension? Compare the fit before choosing

A decision matrix for product fit, audience, required changes and ongoing responsibility, with two hypothetical situations and a clear next step for each route.

Practical guide · worked example with code

Check the enquiry path

Browser extension project brief: a worked example and template

A filled hypothetical brief for a QA workflow, practical acceptance checks and a blank structure you can copy into a development discussion.

Practical guide · hypothetical brief and copyable template

Use the project brief

Looking for a service? See the separate GA4 traffic service.