Extension Guardian
Audit every Chrome extension you have installed and catch malicious updates.
Standalone $2.99/mo or $29.90/yr.
Why it matters
What Extension Guardian does that nothing else does
- Benefit 1:
One-click audit of every extension you have installed; risk score per item.
- Benefit 2:
Detects ownership transfers — the pattern behind 2025's biggest extension malware.
- Benefit 3:
Permission-upgrade alerts notify you when an extension quietly grows its access.
- Benefit 4:
Pro adds 24h auto-scan, version-history tracking, and a personal whitelist.
Pricing
Buy Extension Guardian alone, or get the bundle
Use only this extension? Buy it standalone. Use three or more Aegis extensions? The Pro Pack pays for itself.
Standalone
Extension Guardian Pro
$2.99/mo
Or $29.90/yr — save when paid annually.
Pro tier on Extension Guardian only. Cancel anytime.
Get Extension Guardian ProBest value
Save $21/yrAegis Pro Pack
$9.99/mo
Or $99/yr — covers every Aegis extension you install.
Unlocks Pro on Extension Guardian and every other Aegis extension. New extensions included automatically.
Get the Pro PackBuilt the Aegis way
Privacy you can verify, not just claim
On-device by default
Every Aegis extension runs in your browser. No silent cloud upload, no server-side processing of your activity.
Never sold, never bundled
Aegis extensions never change ownership. Updates come from the same publisher you trusted at install.
No account required
Install and use immediately. Pro features unlock with a single sign-in to your Aegis Pro Pack.
MV3-native
Built for Chrome Manifest V3 from day one — no deprecation warnings, no broken background pages.
Why switch
Extension Guardian vs Chrome Safety Check
Chrome Safety Check warns once Google's scanners catch a malicious extension. Extension Guardian flags ownership transfers and permission upgrades the moment they happen, so you can act before classification.
| Feature | Extension Guardian | Chrome Safety Check |
|---|---|---|
| Monthly price | $2.99/mo | Free (with the trade-offs above) |
| Account required | No — install and use immediately | Often yes (varies by competitor) |
| Data leaves the browser | No — on-device by default | See competitor privacy policy |
| Ownership transfer risk | Aegis never sells extensions | Varies — see ExtensionWatch in this catalog |
| Bundled with Aegis Pro Pack | Yes — $9.99/mo unlocks every extension | No bundle |
See it in action
Extension Guardian screenshots
More screenshots and the full feature walkthrough live on the Extension Guardian landing page.
Common questions
- Why does Extension Guardian need the management permission?
- Listing, scoring, and watching other extensions requires Chrome's `management` permission — there is no alternative API. The extension never sends your install list to a server.
- How is "ownership transfer" detected?
- When the publisher name, homepage URL, and update URL on a CWS-listed extension change at the same time, that pattern indicates the listing was sold. Extension Guardian flags those changes on the next scan.
- What if I trust an extension that gets flagged?
- The personal whitelist (Pro) silences alerts for extensions you have reviewed and trust. Free tier surfaces every change so you make the call manually.
- How does the Aegis Pro Pack unlock Extension Guardian?
- Sign in to aegisfirma.com from any installed Aegis extension popup. The cookie-auth flow detects your active Pro Pack and unlocks Pro features instantly — no license key to copy or paste.
- Where is my Extension Guardian data stored?
- Extension Guardian stores everything in chrome.storage on your device. Your subscription record lives in our payment provider's account; we do not aggregate browsing or activity data.
- Can I cancel Extension Guardian Pro anytime?
- Yes — billing stops at the end of the current period. Pro features remain active until the period ends, then drop back to the free tier.
- Why should I trust an extension I just heard of?
- Aegis extensions never change ownership and never sell user data. We publish security audit results and ship MV3-native code so Chrome itself enforces the permissions we claim.
Try Extension Guardian free, upgrade when ready
Free tier covers the basics. Pro Pack at $9.99/mo unlocks every Aegis extension at once.