STR: 1) In OSX with a Retina display, enter customization mode 2) Look at the subscribe icon It has no icon. :/ See http://cl.ly/image/3R3S3h0v0N16

Stephen, I think we'll need an upscaled icon for this.

There is an @2x icon in the menuPanel-icons@2x.png sprite

Mike, this is a patch that fixes it, but in a dirty way... (old) XUL button selectors, `#feed-button` in this case, take precedence over the descendant selector inside the hidpi media query block. I can take this route, but I could also add more selectors to define the list-image that are more specific and include the XUL button ids (using `@primaryToolbarButtons@`?).

Comment on attachment 761998 [details] [diff] [review] Fix HiDPI icons for XUL buttons inside the customization palette Review of attachment 761998 [details] [diff] [review]: ----------------------------------------------------------------- Hm, yeah, I don't prefer this solution. Using @primaryToolbarButtons@ in a :-moz-any sounds like a better solution. Perhaps these rules can go directly in browser.css after the .toolbarbutton-1 rules.

Comment on attachment 762024 [details] [diff] [review] Fix HiDPI icons for XUL buttons inside the customization palette Review of attachment 762024 [details] [diff] [review]: ----------------------------------------------------------------- This looks right to me. Thanks Mike!