How to Open a Desktop Application from a Browser Without User Involvement?

I want to open a desktop application (or a shortcut) from my web page. I understand that this is not a common practice, but I would like to know whether it is possible.

I have tried using Custom URL Protocol Handling via the Windows Registry, but this approach requires user involvement and admin rights (modifying the registry, etc.).

What I Tried (Registry-Based Approach) I followed these steps to register a custom protocol in Windows:

- Press Win + R, type regedit, and press Enter.
- Create a New Protocol Key: HKEY_CLASSES_ROOT\MyApp
- Set the (Default) value to "URL:MyApp Protocol".
- Add a new String value named "URL Protocol" (leave it empty).
- Inside HKEY_CLASSES_ROOT\MyApp, create a subkey: HKEY_CLASSES_ROOT\MyApp\shell\open\command
- Set (Default) to the executable path, e.g.: "C:\Path\To\MyApp.exe" "%1"

This works, but it requires user confirmation and admin access to modify the registry. Also it is windows dependent solution, I am looking for multi OS supported solution.
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My Requirement

I want to launch the application directly from my Angular web page without needing users to modify the registry manually. Is there any way to achieve this without admin rights or user involvement?

Any alternative solutions or workarounds would be greatly appreciated!

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