Is there a way to find string in web content？

[keiya01]

Is your feature request related to a problem? Please describe.
I want to find sowe string in web content like this api

Describe the solution you'd like
I thik we can use this api on macOS.
I will search about other os.

Describe alternatives you've considered
Implemet it with rust or javascript by myself.

Would you assign yourself to implement this feature?

• Yes
• No

Additional context
Add any other context or screenshots about the feature request here.

[keiya01]

We can use WebKitFindController on Linux.
Windows does not support find api, but windows display a search box when user press ctrl + f.