Chrome extension authentication template
Launch your SaaS faster with a Chrome extension auth starter kit: OAuth2, secure token storage, Manifest V3 support, popup UI & background scripts template.
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Build secure, MV3‑compliant Chrome extensions
Start with a focused Manifest V3 baseline: service worker background, content scripts, and a minimal permission model that’s production‑minded from day one.
MV3 essentials
- Service worker background with durable event handling
- Granular permissions and host permissions by origin
- Declarative rules where possible to improve performance
- Strict CSP and isolated world content scripts
Architecture overview
Keep logic in the background service worker, pass only necessary data to content scripts, and scope permissions narrowly. This improves review success rates and reduces security surface.
Identify required APIs and the minimum host permissions needed for the core use case.
Establish a typed messaging layer; keep page context isolated and least‑privileged.
Build, load unpacked in Chrome, validate permissions warnings, and test review‑critical flows.
Clear, minimal permissions and a focused product narrative shorten Chrome Web Store review times and improve install conversion.
Use cases
- Productivity: Contextual actions on specific domains
- Developer tools: Inspectors, debuggers, and data extractors
- AI assistance: Page analysis and summarization via background models
Best practices
- Request only required permissions; show clear user value for each.
- Keep secrets out of content scripts; use background for network access.
- Provide a privacy policy and explain data usage in the listing.
Publishing
- Validate with Chrome’s extension manifest validator.
- Provide screenshots, minimal permission prompts, and a concise description.
- Test updates via staged rollout and keep a rollback CRX ready.
Sounds good?Now let's make it real. In minutes.
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