Most Chrome extension tutorials show you a popup with a counter. Click a button, increment a number, done. That's fine for learning the API.

But what if your extension needs OAuth with PKCE, multi-tenant team switching, content script injection into arbitrary web pages, offline detection, session refresh via background alarms, and role-based access control?

We built a Chrome extension for PaperLink - a document sharing and analytics platform. The extension lets you create secure share links for your documents and insert them directly into any text field on any page - Gmail compose, Slack message box, Google Docs, whatever you're typing in.

We used Clean Architecture for the whole thing.…