Chrome Extension Authentication with Plasmo

Chrome extensions offer broad reach and can improve user workflows, but their development can involve substantial boilerplate and browser-specific complexity. The Plasmo Framework simplifies extension creation through a React-based structure, CLI setup, and support for popup, options, new-tab, and content-script pages, illustrated with a basic interactive popup. PropelAuth can be integrated to provide hosted signup, login, account-management, password reset, and two-factor authentication experiences, while its React tools expose user status and logout functionality within the extension interface. For authenticated backend communication, the discussion explains that requests from injected content scripts may face CORS and content-security-policy restrictions, so Plasmo’s Messaging API can route requests through a background service worker. Using PropelAuth’s JavaScript client, the worker can retrieve and refresh user access tokens, attach them as Bearer tokens to API requests, and allow the backend to verify them with PropelAuth libraries.

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