I've just become aware of the blisk browser. It's a developer oriented browser based on Chrome or Chromium. It's freeware.
Its developer orientation allows it to show multiple views of the same page side by side for different devices. That's really useful.
I'm not sure if you could get it licensed for Portable Apps. Their license says you can distribute it, but not alter it.
Here's the home page: blisk.io. Here's the license: https://blisk.io/eula