How to properly organize debugging and logging in a multi-component browser extension structure?

Extension debugging differs from debugging regular websites because the application consists of several isolated execution contexts. The developer has to simultaneously monitor the operation of the background service worker, content scripts injected into the web page context, and user interface popups.

Each of these components opens its own developer tools, and finding them often causes difficulties for beginners. For example, to view the background script console, you need to open the extensions management page and follow a specific inspector check link for the particular add-in.

Content scripts execute within target web pages, so their logs and errors are output directly to the developer console of the visited page itself, which requires careful message filtering. For convenient application state monitoring, developers often create a unified logging module that collects critical events and errors from all components.

Proper organization of the debugging and error monitoring process allows you to quickly find and resolve issues occurring on the user side. Setting up detailed logging helps reproduce rare bugs that are difficult to notice during local development and basic functionality testing.