1854569 - (necko-glean) [meta] Migrate Necko telemetry to Glean

Status: NEW

(Core :: Networking, enhancement, P2)

Description

[Valentin Gosu [:valentin] (he/him)]

There are a lot of networking probes that are currently unavailable on Android.
Considering how important this platform is, that seems problematic.
Migrating all/the most important probes to Glean will allow us to:

• Monitor performance regressions
• Track usage of features
• Identify performance issues that only occur on Android

Comment 1

[Valentin Gosu [:valentin] (he/him)]

Note that I discovered that some probes are currently being reported on Fenix via this streaming telemetry

That should make it easier to migrate some of these probes, without having to change the actual implementation.

Comment 2

[Valentin Gosu [:valentin] (he/him)]

Bug 1877839 converted the streaming telemetry we had to real glean probes.

Going forward, we should also convert the remaining Necko probes to glean.
In order to not lose historical data when converting the probes, we should try to:

1. When the glean probe definitions are compatible with the old definitions, we can use telemetry_mirror
2. When the new glean definition is not compatible with the old definition, we should keep the old probe for at least 6 months before we remove it.