1627708 - Add desktop zoom usage telemetry

Status: RESOLVED FIXED

(Core :: Panning and Zooming, task, P3)

Description

[Kris Taeleman (:ktaeleman)]

Implement telemetry when Desktop Zooming is being used. It should cover:

• How much it is used (counter on zoom start or end)
  ** Once per pageload
• input method used when zooming (touch/touchpad/mouse(if applicable))
• (optional) How much the user zoomed in
  ** min max median? would need to be figured out

Comment 1

[Kartikaya Gupta (email:[e-mail])]

For additional context:

(In reply to Kris Taeleman (:ktaeleman) from comment #0)

• How much it is used (counter on zoom start or end)
  ** Once per pageload

Recording once per pageload will give us a metric of "x% of pages loaded had some zooming activity" which is a measure of engagement. We can track engagement as we make changes to see if it goes up or down, and to generally get a sense of how widely used it is.

• input method used when zooming (touch/touchpad/mouse(if applicable))

This will help us prioritize bugs.

• (optional) How much the user zoomed in
  ** min max median? would need to be figured out

Knowing the limits of common zooming actions can help us decide if we need to spend time on e.g. memory and performance. But defining "limits" might be a bit tricky because you ideally want to measure the zoom levels at which people spend the most time.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

I can pick this up

Comment 3

[Kartikaya Gupta (email:[e-mail])]

Attachment: Data collection request

Comment 4

[Kartikaya Gupta (email:[e-mail])]

Attachment: Bug 1627708 - Add boolean telemetry histograms for recording if APZ zooming occurred. r?tnikkel

Comment 5

[Kartikaya Gupta (email:[e-mail])]

Attachment: Bug 1627708 - Add a PinchGestureSource enum that indicates the source of a PinchGestureInput event. r?botond

Depends on D77827

Comment 6

[Kartikaya Gupta (email:[e-mail])]

Attachment: Bug 1627708 - Record pinch source in a telemetry histogram. r?botond

Depends on D77828

Comment 7

[Chris H-C :chutten]

Comment on attachment 9153444 [details]
Data collection request

DATA COLLECTION REVIEW RESPONSE:

    Is there or will there be documentation that describes the schema for the ultimate data set available publicly, complete and accurate?

Yes. This collection is Telemetry so is documented in its definitions file [Histograms.json](https://hg.mozilla.org/mozilla-central/file/tip/toolkit/components/telemetry/Histograms.json) and the [Probe Dictionary](https://telemetry.mozilla.org/probe-dictionary/).

    Is there a control mechanism that allows the user to turn the data collection on and off?

Yes. This collection is Telemetry so can be controlled through Firefox's Preferences.

    If the request is for permanent data collection, is there someone who will monitor the data over time?

No. This collection will expire in Firefox 85.

    Using the category system of data types on the Mozilla wiki, what collection type of data do the requested measurements fall under?

Category 2, Interaction.

    Is the data collection request for default-on or default-off?

Default on for all channels.

    Does the instrumentation include the addition of any new identifiers?

No.

    Is the data collection covered by the existing Firefox privacy notice?

Yes.

    Does there need to be a check-in in the future to determine whether to renew the data?

Yes. :kats is responsible for renewing or removing the collection before it expires in Firefox 85.

---
Result: datareview+

Comment 8

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/0f152045a4a0
Add boolean telemetry histograms for recording if APZ zooming occurred. r=tnikkel
https://hg.mozilla.org/integration/autoland/rev/7b356f85d775
Add a PinchGestureSource enum that indicates the source of a PinchGestureInput event. r=botond
https://hg.mozilla.org/integration/autoland/rev/b830bc407224
Record pinch source in a telemetry histogram. r=botond

Comment 9

[Dorel Luca [:dluca]]

https://hg.mozilla.org/mozilla-central/rev/0f152045a4a0
https://hg.mozilla.org/mozilla-central/rev/7b356f85d775
https://hg.mozilla.org/mozilla-central/rev/b830bc407224