diff --git a/aspnetcore/blazor/debug.md b/aspnetcore/blazor/debug.md
index b25963959c..e05844e8f0 100644
--- a/aspnetcore/blazor/debug.md
+++ b/aspnetcore/blazor/debug.md
@@ -221,7 +221,7 @@ The following launch configuration options are supported for the `blazorwasm` de
 | Option    | Description |
 | --------- | ----------- |
 | `request` | Use `launch` to launch and attach a debugging session to a Blazor WebAssembly app or `attach` to attach a debugging session to an already-running app. |
-| `url`     | The URL to open in the browser when debugging. |
+| `url`     | The URL to open in the browser when debugging. Defaults to `https://localhost:5001`. If the app is running at a different URL, an `about:blank` tab launches in the browser. |
 | `browser` | The browser to launch for the debugging session. Set to `edge` or `chrome`. Defaults to `chrome`. |
 | `trace`   | Used to generate logs from the JS debugger. Set to `true` to generate logs. |
 | `hosted`  | Must be set to `true` if launching and debugging a hosted Blazor WebAssembly app. |
@@ -649,7 +649,7 @@ The following launch configuration options are supported for the `blazorwasm` de
 | Option    | Description |
 | --------- | ----------- |
 | `request` | Use `launch` to launch and attach a debugging session to a Blazor WebAssembly app or `attach` to attach a debugging session to an already-running app. |
-| `url`     | The URL to open in the browser when debugging. Defaults to `https://localhost:5001`. |
+| `url`     | The URL to open in the browser when debugging. Defaults to `https://localhost:5001`. If the app is running at a different URL, an `about:blank` tab launches in the browser. |
 | `browser` | The browser to launch for the debugging session. Set to `edge` or `chrome`. Defaults to `chrome`. |
 | `trace`   | Used to generate logs from the JS debugger. Set to `true` to generate logs. |
 | `hosted`  | Must be set to `true` if launching and debugging a hosted Blazor WebAssembly app. |
@@ -1077,7 +1077,7 @@ The following launch configuration options are supported for the `blazorwasm` de
 | Option    | Description |
 | --------- | ----------- |
 | `request` | Use `launch` to launch and attach a debugging session to a Blazor WebAssembly app or `attach` to attach a debugging session to an already-running app. |
-| `url`     | The URL to open in the browser when debugging. Defaults to `https://localhost:5001`. |
+| `url`     | The URL to open in the browser when debugging. Defaults to `https://localhost:5001`. If the app is running at a different URL, an `about:blank` tab launches in the browser. |
 | `browser` | The browser to launch for the debugging session. Set to `edge` or `chrome`. Defaults to `chrome`. |
 | `trace`   | Used to generate logs from the JS debugger. Set to `true` to generate logs. |
 | `hosted`  | Must be set to `true` if launching and debugging a hosted Blazor WebAssembly app. |