In which situation is browser extension injection appropriate?

Browser extension injection is particularly appropriate in situations where there is no access to either the host or application code. In this scenario, using a browser extension allows for the collection of data or monitoring of the web application from the client-side without needing access to the underlying application server or its source code. This method provides a way to gather insights about the user’s interaction with the web application directly from the browser environment, enabling the capture of performance metrics, user behaviors, and other relevant analytics that would otherwise be inaccessible.

This approach can be crucial for developers and testers who are validating performance metrics or functionality in applications that are hosted or developed by third parties, as it circumvents limitations where server-side instrumentation isn’t possible. It is especially valuable for quick diagnostics and testing scenarios where setup time needs to be minimized.