1504284 - bug 1501503 is causing bogus warnings for various css/js files (and maybe other resources)

Status: VERIFIED FIXED

(Core :: CSS Parsing and Computation, defect)

Description

[:Gijs (he/him)]

With bug 1501503 landed, some of us noticed warnings for about:newtab about content that wasn't being loaded in the browser console.

After some exploring, ursula and others realized they were happening in loads of places.

Here's some example STR:

1. open about:newtab;


or

1. open https://accounts.firefox.com/

For the latter, for instance, nightly now warns:

Security Error: Content at https://accounts.firefox.com/ may not load data from https://accounts-static.cdn.mozilla.net/styles/8d4a7f62.main.css.

but this is bogus - the main.css file is the only CSS file on the page, and the page doesn't appear as unstyled garbage and the CSS file is displayed in devtools if you open it, so clearly the file *is* loaded.

The warnings (in these cases) seem to bear no relation to whether loads are actually being blocked.

Brad, can you take a look?

Comment 1

[Brad Werth [:bradwerth]]

Yep. I'll figure it out.

Comment 2

[Brad Werth [:bradwerth]]

In the short term, the changes in Bug 1501503 will be rolled back, which should take care of this. I'll use this as an additional testcase as I build a better fix for Bug 1501503.

Comment 3

[Brad Werth [:bradwerth]]

Bug 1501503 was rolled back, meaning we can close this.

Comment 4

[Emil Ghitta, QA [:emilghitta]]

I have managed to reproduce this issue using Firefox 65.0a1 (BuildId:20181102220121).

This issue is verified fixed using Firefox 65.0b12 (BuildId:20190117232427) on Windows 10 64bit, macOS 10.14.3 and Ubuntu 16.04 64bit.