Checkup

Draft NOINDEX expansion 2026-08-10; overall scores unpublished

Published by By SecurityChecklist

Reviewed Independent reviewer role open

Experts policy

Browser Extension Security Checklist

Least-privilege extensions before scanner logos: SecurityChecklist keeps this draft free-first and claim-safe. A malicious extension can read every page you visit. Audit quarterly. Optional paid cards use claim-ledger prices from 2026-08-09 (Bitdefender Antivirus Plus from $24.99/yr first year; Malwarebytes from $59.99/yr). Overall scores stay unpublished (N/Pub). Who should not buy: anyone who has not confirmed OS updates and built-in protection, anyone stacking multiple always-on engines, or anyone who needs published lab detection rates before deciding.

Start Antivirus Finder →
  • Guide · Free-first · Draft NOINDEX

Priority checklist

  1. 1List installed extensions
  2. 2Remove anything you do not recognize or use
  3. 3Prefer official store listings with clear publishers
  4. 4Deny broad permissions when optional
  5. 5Paid AV does not replace extension hygiene
Start Antivirus Finder →

Checklist

  1. 1

    Audit what is installed

    Free

    Open your browser extension page. If you cannot name the job of an add-on, remove it.

    • Export or screenshot the list
    • Remove unknown add-ons
    • Restart browser after cleanup
  2. 2

    Check permissions

    Free

    Extensions that read all site data are high risk. Prefer ones limited to specific sites when the job allows.

    • Review each permission prompt
    • Disable on sites where not needed if offered
    • Avoid coupon extensions that need full-page access
  3. 3

    Install only from official stores

    Free

    Sideloaded extensions bypass review. Prefer Chrome Web Store, Edge Add-ons, or Firefox Add-ons.

    • Confirm publisher name
    • Skip random ZIP installs
    • Update or remove abandoned extensions
  4. 4

    AV is a different leftover job

    Optional paid

    Paid antivirus does not audit your extensions for you. Keep Defender healthy; buy suites only for other leftover device jobs.

    • Keep OS AV baseline on
    • Do not install fake cleaner extensions
    • Read who should not buy before /go/

What this checklist does not cover

  • Compromised legitimate extensions before vendor disclosure
  • Guaranteed store review perfection
  • Invented extension malware percentages

Sources

  • Browser extension permission models, Official Chrome/Edge/Firefox extension documentation; UI labels vary
  • Bitdefender claim ledger, data/claim-ledgers/bitdefender.json; Antivirus Plus from $24.99/yr first year captured 2026-08-09
  • Overall scores unpublished (N/Pub), No invented lab scores, detection rates, or aggregate ratings on Batch39/40/41 drafts
  • Vendor marketing pages, bitdefender.com / malwarebytes.com feature and pricing claims, not independent lab evidence
  • Security Checklist methodology, How antivirus pages are structured before scores and detection rates publish, /methodology/
  • Claim ledger (T014), data/claim-ledgers/bitdefender.json + malwarebytes.json, starting prices verified 2026-08-09; lab scores unpublished

Next steps

Frequently asked questions

Internal links

Continue in this cluster

Hub, tools, and related pages from the inventory. No invented URLs.

Expert guides & insights

Related guides

Stay in the same problem space without jumping brands.

Want launch updates?

The email newsletter is not running yet. Use Contact if you want a human reply when it opens. No fake signup form.

Contact SecurityChecklist