Report CSP errors?

[fregante]

Interesting global event, maybe we can handle it similarly to uncaught errors:

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

@twschiller This might be a partial answer to “how do we know why a request failed”?

[twschiller]

Worth a shot, especially since we've been having network errors.

If we add this, we should only add on our extension pages. Would be way too noisy in the content script (b/c I think we'd pick up CSP errors from the host page)

Potentially could also combine with https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/report-uri, but that wouldn't give user-level information

Related: #3020

[twschiller]

Potentially related: w3c/webextensions#197