where is the file(proxy/widget.html)

[wh78garcia]

when I deleted {host: 'http://localhost:9001'} from metamask.createDefaultProvider({host: 'http://localhost:9001'}) to use metamask webapp(https://wallet.metamask.io),I got the problem:
Cannot GET /proxy/widget.html
I want to know what this file for?

[digitaldonkey]

@danfinlay Maybe it makes sense to add a deprecated warning to the repository?

[wh78garcia]

I found out that maybe they just want to use /proxy/index.html, forgot to change it in the setup-widget.js file. Is it right?