Bug 750054 cleaned up the design/usage/naming of the throbber, but one it didn't touch is is chrome://global/skin/icons/loading-inverted.png (and @2x), which is used in the about dialog when an update check is in progress. The inverted flavor was added by bug 1173612, due to the other throbber not working well on the darker Nightly/DevEdition background. Right now chrome://global/skin/icons/loading.png is a spinning ring with tail/gradient, whereas loading-inverted.png a completely different indicator (like the native OS X throbber). Presumably these should be a similar design. I'm not sure if we can just drop the -inverted flavor (and simply use the normal one everywhere) or if we still need a -inverted flavor but updated to be more similar. Does loading.png work well enough on darker backgrounds?
Created attachment 8769984 [details] screenshot (In reply to Justin Dolske [:Dolske] from comment #0) > Does loading.png work well enough on darker backgrounds? It does at least in this context.
Created attachment 8769985 [details] [diff] [review] patch
Pushed by email@example.com: https://hg.mozilla.org/integration/fx-team/rev/bbbf2ec4d6a2 Remove loading-inverted.png, use loading.png instead. r=dolske