In bug 1724718 I am, after a ~16 month hiatus, once again trying to make it so we do not land references to chrome/resource files that do not exist (by making attempts to load such URLs crash, for files inside omni.ja and friends).

My trypush was quite orange and for junit tests says:

Mozilla crash reason: Missing chrome or resource URLs: chrome://global/skin/in-content/info-pages.css

info-pages.css is packaged in desktop-jar.inc.mn: https://searchfox.org/mozilla-central/rev/72d9bf2d4128990cd1f349d4e15003e515277982/toolkit/themes/shared/desktop-jar.inc.mn#51

As the name suggests, we do not package things in that file in mobile.

The referencing about:license page (opened from testAccessibilityFocusAboutMozilla which doesn't quite do what it says on the tin...) actually looks... fine, on mobile? Somewhat unstyled. But potentially more readable than if we did package info-pages.css .

The one caveat here is that we also don't package error-pages.css, and that gets used by the network error page and such. info-pages.css itself also has direct other toolkit consumers (e.g. about:support, about:serviceworkers, about:about, etc. etc.).

It turns out chrome://global/skin/aboutLicense.css is also referenced and missing...

The severity field is not set for this bug.
:cpeterson, could you have a look please?

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