Firefox uses apple-touch-icon in Urlbar history

[silverwind]

Urlbar history entries in Firefox on macOS have apple-touch-icon as their icon and the browser seems to actively pull the icon during page load. We should seek to prevent this and it should just use the shortcut icon as the apple icon looks ugly with the opaque white background on a dark browser theme:

<link rel="shortcut icon" href="/img/favicon.png">
<link rel="apple-touch-icon" href="/img/apple-touch-icon.png">

[silverwind]

Related discussion: https://old.reddit.com/r/firefox/comments/71rjkt/why_is_top_sites_using_appletouchicon_meta/

I think it's time to remove the opacity on the apple-touch-icon again to fix this:

[silverwind]

More info: https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/UI_considerations#Rich_icons

Checked GitHub, they do not define apple-touch-icon at all, just this which seems to serve the same purpose of a "rich icon":

<link rel="fluid-icon" href="https://github.com/fluidicon.png" title="GitHub">

apple-touch-icon does not need to be specified in HTML as supporting Apple devices will retrieve it from static URL /apple-touch-icon.png (In contrast with Firefox which will not do that). I will attempt this later.