# Metamask checkup Follow the steps below to find out if the Metamask extension that you have installed on your Chrome or Brave is genuine (or a backdoored one). 1. Open chrome/brave, right click on the Metamask extension icon on the upper left and then select "Manage extensions" 2. On the page that opens there should be a slider on the upper right corner that says "Developer mode". Is it turned on or not?   ![](https://i.imgur.com/PjVYZsn.png) 3. Next, scroll down on that page, and there should be a line that says "Source". What does it say under "Source"?   ![](https://i.imgur.com/rfDpY4D.png)   Does it say "Chrome Web Store" ("Web Extensions Source" for Brave) or is it something else? 4. Compare the URL of the page that you're looking at to this one: `chrome://extensions/?id=nkbihfbeogaeaoehlefnkodbefgpgknn`. Is the extension id the same? Send your extension id over chat for a double check.