Do not call _collectStartupConditionsTelemetry and _firstWindowTelemetry
_collectStartupConditionsTelemetry
disk leaks some timing data about the browser startup, and it does so only for telemetry purposes.
And it's quite annoying because it also adds an error in the JS console.
We could just remove the call to it and, since we're at it, also to _firstWindowTelemetry
, which is another telemetry function that we don't care anything about and is called just before the other one.