Since the alpha experiment for Surfacing Add a Link, we've decided to also enable it on desktop.
Further, with T355837 done, we now can also track from the browser performance metrics to statslib, so we should do that and also make those aware of the mobile/desktop distinction.
Acceptance Criteria:
- the instrumentation correctly includes the information of whether the user is on mobile or desktop
- tracking the performance metrics are also tracked with statslib and these also include information about the platform