Closed Bug 1505535 Opened 10 months ago Closed 5 months ago

Add tab usage probes for pinned tabs


(Firefox :: General, enhancement, P3)




Firefox 68
Tracking Status
firefox68 --- fixed


(Reporter: bmiroglio, Assigned: andreio, NeedInfo)



(2 files, 1 obsolete file)

We do not have probes implemented for measuring "who uses pinned tabs". We have data on users that *restore* pinned tabs (, however this only fires for uses that restore a session.

Having the general case will make targeting and promoting this feature to users (who don't use the feature) more straight forward.

I'm requesting we "duplicate" the engagement probes we have for tabs for pinned tabs as well:

Component: Telemetry → Tabbed Browser
Product: Toolkit → Firefox
Priority: -- → P3

There is currently a patch in bug 1508744 to add telemetry probes for pin tab actions. This is part of bug 1501751, an experiment, that will show a message to users on how to pin a tab. The goal of the experiment is to increase the number of pin tab actions.
I'm not sure if this bug is still required although we are not covering the max_concurrent_pinned_tab_count case. I could take on the work if needed.

Flags: needinfo?(bmiroglio)

Yes, pinned tab interactions is still important to have in base Telemetry. max_concurrent_pinned_tab_count is a nice-to-have since it mirrors the telemetry we already collect for standard, non-pinned tabs, but having just the events is still valuable.

Thank you for following up on this bug!

Flags: needinfo?(bmiroglio)
Component: Tabbed Browser → General
Product: Firefox → Data Platform and Tools

Andrei, would you be able to record the "pin tab" event into Telemetry as well?

Flags: needinfo?(andrei.br92)

Sure. I'll follow up with a patch.

Assignee: nobody → andrei.br92
Flags: needinfo?(andrei.br92)
Attached file datareview (obsolete) —


Attachment #9052198 - Flags: data-review?(chutten)
Attachment #9052198 - Attachment mime type: application/octet-stream → text/plain
Comment on attachment 9052198 [details]

I'm afraid it's a data-review- at first.

Permanent collections require a person mentioned in the review request who will be responsible for the collection over time.

Also, the answer to question 5 is incomplete. We need a list of the measurements (there are two) and their Data Collection Categories. (Please follow the instructions on the [Data Collection wiki]( and the [Data Review Request](

I think those are the only two things. When you have those handled please re-request review with the updated request and I'll give it another look-over.
Attachment #9052198 - Flags: data-review?(chutten) → data-review-

Permanent collections require a person mentioned in the review request who will be responsible for the collection over time.

Do you know who would be responsible for this data?

Flags: needinfo?(mreid)

Ben, would you be responsible?

Flags: needinfo?(bmiroglio)
Product: Data Platform and Tools → Firefox

Rebecca, you're currently listed as the owner of the "normal" tab count probes, are you OK with being the responsible party for the new instrumentation around pinned tabs as well?

Flags: needinfo?(mreid) → needinfo?(rweiss)

(In reply to Georg Fritzsche [:gfritzsche] from comment #9)

Ben, would you be responsible?

I can be responsible if needed.

Flags: needinfo?(bmiroglio)
Attached file datareview.txt
Attachment #9052198 - Attachment is obsolete: true
Comment on attachment 9053224 [details]

Can you have another look? Thank you.
Attachment #9053224 - Flags: feedback?(chutten)
Comment on attachment 9053224 [details]

Preliminary note:

Ben's listed on the review request as the monitor for these probes, but his email isn't included in the list of `notification_emails` in the Scalars definitions. It is a good idea to have the monitor be present in that list.


    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 [Scalars.yaml]( and the [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?

Yes, :bmiroglio is responsible.

    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?


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


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

No. This collection is permanent.

Result: datareview+
Attachment #9053224 - Flags: feedback?(chutten) → data-review+
Pushed by
Add tab usage probes for pinned tabs r=janerik
Closed: 5 months ago
Resolution: --- → FIXED
Target Milestone: --- → Firefox 68
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