Most web radios already have an .mp3 192kbps URL stream. Or sites like YouTube, SoundCloud etc where you can copy the URL to parse the audio, which is what the Chrome Extension generally does.
Currently there are apps like NewPipe for YouTube pitch shifting or AIMP for web radios.
It would be VERY great if the Music Speed Changer mobile apps could support this!! In concrete, there should be an "Open URL stream" button on the side menu where you can insert the given stream URL which the app then tries to parse.