On Mon, Jun 15, 2015 at 7:33 PM, Edward O'Connor <eocon...@apple.com> wrote: > Our proposal is simply to add mask="" to this list of advisory > attributes that are used to determine an icon's appropriateness here. > User agents that don't understand mask="" should continue to pick the > most appropriate icon given the other attributes. If there is a tie, the > last <link rel=icon> wins. That is why we recommend authors put <link > rel=icon mask> first—so that the existing tie-breaking behavior results > in the legacy favicon being chosen.
I think the only problem with this advice is that it lacks the bit where you need to list <link rel=icon href=/favicon.ico> explicitly (and last) once you add a <link rel=icon mask> entry. That seems to be the reason why Twitter is now black rather than light blue in Firefox. -- https://annevankesteren.nl/