diff --git a/5-browser-extension/1-about-browsers/README.md b/5-browser-extension/1-about-browsers/README.md
index 4fd6c77f..3d03835b 100644
--- a/5-browser-extension/1-about-browsers/README.md
+++ b/5-browser-extension/1-about-browsers/README.md
@@ -48,6 +48,8 @@ Before you start building, take a look at the process of building and deploying
 
 ![screenshot of the Edge browser showing the open edge://extensions page and open settings menu](images/install-on-edge.png)
 
+[Note: Make sure to toggle on developer mode and allow extension from other stores.]
+
 In essence, the process will be:
 
 - build your extension using `npm run build`