**Is your feature request related to a problem? Please describe.** We have no proxy support for anything **Describe the solution you'd like** Support proxies **Describe alternatives you've considered** There's an alternative world where no one cares about proxies, but we don't live there. **Additional context** Would be cool to add them for a number of reasons: - Supporting additional tools like ZAProxy, BurpSuite and Axe - Makes sure people can tunnel to SauceLabs (important) - Enables spitting loads of garbage requests into tools like JMeter (is anyone still doing that?)