This patch fixes the tests in testing/performance/ that hadn't been updated to
the new API, as well as fixing a couple issues with the `--proxy` option:
* `policy.json` wasn't being logged correctly, since mozlog was treating the
data as a format string
* Proxy prefs weren't being set correctly for the profile
Differential Revision: https://phabricator.services.mozilla.com/D79937
This patch fixes the tests in testing/performance/ that hadn't been updated to
the new API, as well as fixing a couple issues with the `--proxy` option:
* `policy.json` wasn't being logged correctly, since mozlog was treating the
data as a format string
* Proxy prefs weren't being set correctly for the profile
Differential Revision: https://phabricator.services.mozilla.com/D79937