XR Plug-in Management comment in README

Author: De-Panther

Packages/webxr/README.md

@@ -6,8 +6,10 @@ To add the package to your Unity project, open the Package Manager window, click
 
 `https://github.com/De-Panther/unity-webxr-export.git?path=/Packages/webxr`
 
+Then make sure to check `WebXR Export` in `Project Settings > XR Plug-in Management > WebGL > Plug-in Providers`
+
 To update the package, you'll have to manually remove the corresponding package section from the `packages-lock.json` file. For more info read about [Git dependencies](https://docs.unity3d.com/Manual/upm-git.html) in Unity's manual.
 
 
 You might also want to add the WebXR Interactions package, as it has some Interaction Components and Samples.
-You can get the WebXR Interactions package [here](../webxr-interactions/README.md)
+You can get the WebXR Interactions package [here](../webxr-interactions/README.md)