I set proxy global in the whole windows system, and check the ip address in https://www.ip138.com/ and https://whatismyipaddress.com/ , they show that I'm useing my proxy's ip.
I usually use Firefox, also I have tried Edge, they can hit dropbox.com,
both of them can visit the page
https://www.dropbox.com/1/oauth2/authorize?client_id=5jcck7diasz0rqy&redirect_uri=http%3A%2F%2Flocalhost%3A53682%2F&response_type=code&scope=files.metadata.write+files.content.write+files.content.read+sharing.write+account_info.read&state=LBlntQamWeZZBqI5ZXRfZA&token_access_type=offline,
and jump to the following page after I click the “Allow” button.
http://localhost:53682/?state=LBlntQamWeZZBqI5ZXRfZA&code=6R8CGTn2poIAAAAAAAAAUCTkFwOwGVPM9Sv6IBJRhkc
but don't return token on windows powershell.
I set proxy global, but I'm not sure if the proxy software has some hidden proxy rules. What will the browser connect after I click the “Allow” button on the page, maybe I can test it