Is it possible to use this with html file?

[lkc0626]

Is it possible to use this with downloaded html file instead of live website?

[Semigradsky]

Of course you can. Like any another browser extension.

[lkc0626]

I tried to open the html file into the browser but the library detector couldn't recognize any library with HTML file.
Is there any way to run it locally? then input HTML file manually?

[Semigradsky]

This extension detects libraries by executed JS code. Maybe your HTML file has incorrect paths to JS files, you can open Network tab on Browser Developer Tools and check that you haven't 404 or other errors for JS files.