Review Mozilla 1764354: favicon matches browser theme
We should check RFP has this covered and still returns/uses light
FF100: 1764354 Favicon media queries should ignore layout.css.prefers-color-scheme.content-override, and always match browser theme
FF105 1779457 Extend bug 1764354 to apply to content as well.
svg.embedder-prefers-color-scheme.content.enabled
FF107: 1782596 make context-dependent color scheme propagation works in iframes (even cross-origin iframes)
layout.css.iframe-embedder-prefers-color-scheme.content.enabled
Edited by Thorin