Intent to prototype & ship Reporting API

[Simon Farre]

As of Firefox 149, we intend to turn on the Reporting API by default.

Summary:
The Reporting API provides a generic reporting mechanism for web applications to use to make reports available based on various platform features (for example Content Security Policy, Permissions-Policy, or feature deprecation reports) in a consistent manner.

Reporting API has two features, one where the report gets delivered to a ReportingObserver in JS code and one where the report get serialized and sent to a remote server.

Bugs:
Meta bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1631237
Ship bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1976074

Specification: https://w3c.github.io/reporting/

Documentation:

https://developer.mozilla.org/en-US/docs/Web/API/Reporting_API

Standards Body:
W3C

Platform coverage:
all

Preference:
  - dom.reporting.enabled
  - dom.reporting.header.enabled

Both will be enabled by ship bug

DevTools bug:
N/A

Extensions bug:
N/A

Link to standards-positions discussion:
https://github.com/mozilla/standards-positions/issues/104

Other browsers:

- Blink. shipping

- Webkit, shipping

web-platform-tests:
Reporting API is tested in different suites:
https://wpt.fyi/results/reporting
https://wpt.fyi/results/content-security-policy/reporting-api
https://wpt.fyi/results/feature-policy/reporting

Feel free to reach out to me on matrix or slack for questions (preferable matrix), username sfarre

Simon Farre

[Nicolas Chevobbe]

At the moment, the Reporting API report requests are not visible in the DevTools Netmonitor for the tab, I filed https://bugzilla.mozilla.org/show_bug.cgi?id=2013043 for this and we're looking for a solution with Simon

(Note that we already have the same issue for CSP reports (see https://bugzilla.mozilla.org/show_bug.cgi?id=1886790), and the fix for one of those 2 bugs might fix the other)