I am researching how deep linking works across different Android browsers. I noticed that using the intent:// syntax allows one browser to launch another or trigger specific app actions.

For example: intent://192.168.1.103:8002/demo.cn#Intent;scheme=http;package=com.android.chrome;end

When testing this in Mi Browser, it successfully redirects the URL to be opened specifically in Google Chrome.

My Questions:

1. Is the handling of the intent:// scheme (and the parsing of the #Intent;...;end fragment) built into the Android Framework itself?

2. Or, is this a specific implementation that browser developers (like the Chromium team or Xiaomi) must manually code into their WebView or URL handling logic?

3. If I were building a custom browser, would this work "out of the box," or would I need to parse these strings and start an Activity manually?