Chrome Web Store
Manifest V3, service workers, largest desktop user base.
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Chrome Web Store vs Firefox Add-ons Testers
Updated 2026-07-17 · Published 2026-07-14
Executive summary
Chrome MV3 shifted extension architecture toward service workers and stricter permission models. Firefox retains different APIs and review norms. Cross-browser gigs exist, but deep store expertise is often browser-specific.
Quick answer
Hire chrome_web_store-tagged testers for MV3 service worker and permission prompts; hire firefox_addons-tagged testers for Firefox-specific APIs and AMO listing requirements. Scope separate gigs if you ship both builds.
Firefox Add-ons
AMO review, distinct API surface, privacy-focused user base.
Browse Firefox Add-ons providersSide-by-side comparison
| Criteria | Chrome Web Store | Firefox Add-ons |
|---|---|---|
| Architecture focus | MV3 service workers, optional permissions | Background scripts / browser-specific APIs |
| Listing assets | Chrome policy on permissions justification | AMO source review expectations |
Cross-browser strategy
Maintain a shared test charter with browser-specific appendices. One lead tester plus a secondary browser pass often costs less than a vague “all browsers” gig.
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