We'd like to measure user interaction with the new certificate error pages. We collected a number of possible measurements/improvements here: https://docs.google.com/document/d/1aEEqg42ksMGpHNNfEDK8p1rxMHyaV23s3kZzwA21g5c/edit# We definitely want to get rid of using the old SECURITY_UI probe (https://mzl.la/2JEwAlH).

Comment on attachment 9016037 [details] request.md 1) Is there or will there be **documentation** that describes the schema for the ultimate data set available publicly, complete and accurate? Yes, in Events.yaml. 2) Is there a control mechanism that allows the user to turn the data collection on and off? Yes, telemetry setting. 3) If the request is for permanent data collection, is there someone who will monitor the data over time?** Not permanent. 4) Using the **[category system of data types](https://wiki.mozilla.org/Firefox/Data_Collection)** on the Mozilla wiki, what collection type of data do the requested measurements fall under? ** Category 1 and 2. 5) Is the data collection request for default-on or default-off? Default ON, only in pre-release channels. 6) Does the instrumentation include the addition of **any *new* identifiers** (whether anonymous or otherwise; e.g., username, random IDs, etc. See the appendix for more details)? No. 7) Is the data collection covered by the existing Firefox privacy notice? Yes. 8) Does there need to be a check-in in the future to determine whether to renew the data? No, telemetry alerts are enough.

Chris, this is a new Event probe, but I assume it's fine because it's only sent when users encounter a TLS certificate error page.

Tied to user interaction means I'm not too worried about volume. And it's prerelease-only.

Pushed by jhofmann@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/1119f9458b5d Add Telemetry Events for the certificate error pages. r=nhnt11,keeler

Backout by aciure@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/111455f16f4b Backed out changeset 1119f9458b5d for browser_aboutCertError_telemetry.js failures CLOSED TREE

Backed out changeset 1119f9458b5d (bug 1484255) for browser_aboutCertError_telemetry.js failures push that caused the backout: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&group_state=expanded&selectedJob=205665019&revision=1119f9458b5d76cef62577b526c508f7908f4710 failures: https://treeherder.mozilla.org/#/jobs?repo=autoland&group_state=expanded&revision=1119f9458b5d76cef62577b526c508f7908f4710&failure_classification_id=2&selectedJob=205674491 backout: https://hg.mozilla.org/integration/autoland/rev/111455f16f4b52fe6c398fc337d48fe64a29608c

Pushed by jhofmann@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/00562394d243 Add Telemetry Events for the certificate error pages. r=nhnt11,keeler

Build ID 20181023100120 User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0 Verified in latest Nightly