1602093 - Make CORS errors errors, not warnings, in the console

Status: RESOLVED FIXED

(Core :: DOM: Security, defect)

Description

[Boris Zbarsky [:bzbarsky]]

They're basically fatal errors for something the page is trying to do, so we should make them more prominent. This is not a "you might be doing something wrong, we think"; this is a "you tried to do something and it totally failed".

I looked into why they are warnings now, but that's just what they were in the initial commit in bug 713980.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Attachment: Bug 1602093. Make CORS error messages be errors, not warnings. r=ckerschb

These typically indicate a fatal problem for whatever the page is trying to do;
we should give them the appropriate visibility.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b6aa2fa7f967
Make CORS error messages be errors, not warnings.  r=ckerschb

Comment 3

[Narcis Beleuzu [:NarcisB]]

https://hg.mozilla.org/mozilla-central/rev/b6aa2fa7f967

Comment 4

[Florian Scholz (Open Web Docs)]

I believe we've always documented these as errors and not as warnings. See https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS/Errors for some material. I've mentioned this change on https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/73, though.
If there is any further docs update needed anywhere, let me know.