Backport - Warning that favicon load request got cancelled is confusing

After Mozilla fixed #18513 (moved) a confusing warning is often visible in the console:

When cancelling a request for chrome://browser/skin/preferences/in-content/favicon.ico because the inner window was destroyed or a new favicon was loaded for it, it was already canceled! PlacesUIUtils.jsm:109:0

Mozilla seems to fix this with https://bugzilla.mozilla.org/show_bug.cgi?id=1279650. We could think about backporting this to Tor Browser.

This was first reported on our blog with https://blog.torproject.org/blog/tor-browser-65a2-released#comment-196614.

added component::applications/tor browser ff52-esr-will-have owner::tbb-team priority::medium resolution::fixed severity::normal status::closed tbb-easy type::defect labels

It's funny that Mozillians "kill off useless warning" instead of fixing its reason ;) It looks like my report will not be addressed in the next alpha :(

Trac:
Keywords: N/A deleted, tbb-easy added
Summary: Warning that favicon load request got cancelled is confusing to Backport - Warning that favicon load request got cancelled is confusing

Trac:
Keywords: N/A deleted, ff52-esr-will-have added

This will be fixed in 7.0a3 which is based on Firefox 52 ESR.

Trac:
Status: new to closed
Resolution: N/A to fixed

closed

moved to tpo/applications/tor-browser#19955 (closed)