The "save page" issue gave me the idea that we could submit an official input from the WMF to the Mozilla Foundation on 10 key issues that affect users of MediaWiki (an thereby, WMF). We have a fairly good relationship with Mozilla & I think they'd be willing to give these issues some priority if we ask nicely. A quick search on bugzilla.mozilla.org suggests there are plenty of issues; if someone wants to take the lead on this, I've started a stub here:
http://meta.wikimedia.org/wiki/Top_10_Firefox_bugs