Engagement data collection

[oyiptong]

Implement code in add-on to send messages to data-pipeline.

Maybe start with a few messages add-on side, we can do content in a follow-up ticket

[oyiptong]

Other measurements:

• Time spent on UI
• CTR

Other engagement metrics TBD

• Number of newtab opens per user
• Disable
• Uninstall
• Opt-out: switch back to old newtab

[oyiptong]

• scroll depth

[k88hudson]

@oyiptong @emtwo to clarify

[oyiptong]

following a meeting with @nchapman, @tspurway jotted down some notes in #27.

The pings should be as follows:

When a user opens a newtab page, we make note of the time (start a counter).

We then capture an exit condition:

1. a user clicks on a link
2. a user enters something in the url bar and hits enter
3. a user closes the tab

In case #1, when that happens, we want to record:

1. the maximum scroll depth reached
2. the y-position of the link in px
3. the type of link they clicked (top sites, bookmark, etc)
4. the time they spent on the page

in case #2 we only want to record an impression, but that they used the URL bar, and the dwell time

in case #3 we only want to record an impression, but that they closed it, and the dwell time

There may be more things to record, or more use cases, but this should give a good idea