Browser extensions: official install paths and permission checks

Basic check order

1. Start from the browser vendor, official extension store, or the software vendor page that links to the store listing.
2. Confirm the publisher, extension name, icon, verified domain, install count, update date, and support or privacy-policy links before adding it.
3. Read permission prompts literally: page read/write access, clipboard access, downloads, file URLs, native messaging, cookies, and all-site access can expose sensitive data.
4. Prefer least-privilege settings such as click-to-run, specific-site access, managed browser profiles, and separate personal/work browser profiles.
5. For password managers, VPNs, AI helpers, coupon tools, and screenshot extensions, review account ownership, data upload, retention, and sharing settings before sign-in.
6. For business use, document the approved extension ID, browser store URL, publisher, allowed profiles, data categories, update policy, and removal/offboarding owner.

Cautions and operating tips

• An official browser extension store reduces some risk but does not prove that every listing is appropriate for work data.
• A fake or abandoned extension can imitate a trusted brand name, icon, or keyword; compare the listing from the vendor page when possible.
• Extensions with access to all websites can see internal dashboards, customer records, source-code tools, and login pages that ordinary desktop apps may never touch.
• Browser sync can reinstall extensions on new devices, so removal and offboarding should include synced profiles and managed policies.

Common scenarios

FAQ

Related guide checklists

Related official download guides