Idea: configurable host resolution rules.

One common thing we do is to point certain parts of WP.com to our developer sandbox. It would be very handy to compare if we could simultaneously run a browser instance resolving to the developer sandbox and the other one resolving to the production.

The challenge here is that there doesn't seem to be a reliable way across all the browsers for this: https://github.com/microsoft/playwright/issues/2767.

One way guaranteed to work is to run through a docker container, but I'd try not to go that heavy-weighted route unless absolutely necessary.

No files or tests are named. Start by reviewing the existing browser setup and the cross-browser limitation discussed in Playwright issue 2767; done means supporting simultaneous sandbox and production host resolution without Docker unless no lighter approach works.

Written by the indexing model from the issue text.