How to confirm a browser extension ID is official

Names and icons can be copied. The extension ID can’t. Here’s how to use it to tell real from fake.

Security Guides · 5 min · Updated Jun 2026

A fake extension can copy the real one's name, icon, and description. The one thing it cannot copy is the official extension ID — a unique string assigned to each listing. Checking it is the fastest real-or-fake test there is.

Where the ID lives

On the Chrome Web Store, the 32-character ID appears in the listing URL right after /detail/<name>/. For example, MetaMask's is nkbihfbeogaeaoehlefnkodbefgpgknn. Firefox and Edge expose similar identifiers on the add-on page.

Official IDs for major wallets

Each wallet's official Chrome ID is listed on its WalletGuard hub. A few of the most-targeted:

  • MetaMask: nkbihfbeogaeaoehlefnkodbefgpgknn
  • Phantom: bfnaelmomeimhlpmgjnjophhpkkoljpa
  • Rabby: acmacodkjbdgmoleebolmdjonilkdbch

Always cross-check against the developer's official site too — then confirm the verified publisher and the user count.

Why this beats checking the name

Scammers register listings like “MetaMask — Official” with a cloned icon. The display name and logo are trivial to fake; the ID is not. If the ID doesn't match, walk away — no matter how convincing the page looks.

For the MetaMask-specific walkthrough, see how to spot a fake MetaMask extension and our safe download guide.

Frequently asked questions

Where do I find a Chrome extension’s ID?

In the Chrome Web Store listing URL, the 32-character ID appears right after /detail//. Compare it to the official ID published by the developer.

Why is the extension ID more reliable than the name?

Names, icons, and descriptions can be copied exactly by scammers. The extension ID is unique to each listing and cannot be faked, so it is the most reliable check.

What is the official MetaMask extension ID?

nkbihfbeogaeaoehlefnkodbefgpgknn for the Chrome Web Store listing.

See official wallet IDs