The lightest browser shield you’ll install.
Chrome and Edge today, Firefox in Phase 2. Manifest V3 — fast, modern, future-proof.
< 5 MB
memory footprint
Every feature you'll actually use
URL guard
Every page load checked against 4 threat sources.
Ad Blocker
EasyList + EasyPrivacy · per-site allow · built-in counter.
Phishing block page
Full-screen warning replaces malicious sites.
Whitelist & block-list
Per-site overrides synced with your desktop install.
Sync with desktop
Settings, history and threat log mirror across devices.
Privacy-first
No tracking. No cookies. Local first.
Available in
Full extension + Ad Blocker + sync on every paid plan. 7-day trial includes everything.
Why people pick Alpha Browser Extension
“I tried 3 antivirus tools before this. Alpha Browser Extension just works — no nags, no slowdown.”
Sarah W.
San Francisco
“The team is incredibly responsive. Saw a feature request honoured in two weeks.”
Michael C.
Toronto
Common questions
Does it work without the desktop app?
Yes — but with desktop installed, you get sync, whitelist mirroring and a proper threat history.
Firefox?
Phase 2. Manifest V3 standardisation across Firefox is still settling.
Get Alpha Browser Extension today
Start free. Upgrade when you feel the friction. 30-day money-back guarantee.