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:
I did a quick search on Mozilla's bugzilla - restricted to bugs logged against Firefox, and that are UNCONFIRMED / NEW / ASSIGNED / REOPENED / VERIFIED [i.e. not RESOLVED or CLOSED], and where any comment contains the word "wikipedia", and where it has more than 2 votes [to cut out the stuff that's not impacting too many people].
That gives 17 bugs: http://tinyurl.com/34qsov
Scanning quickly through those gives some issues which look to no longer affect the wikipedia, some which are specific to Linux and where the Wikipedia is just used as an example, some that include a Wikipedia article as a reference, etc.
Probably the one that most seemed like a potential for the list was https://bugzilla.mozilla.org/show_bug.cgi?id=366797 ( Revise the Location Bar ) which seems to cover not showing unreadable URLs in the address bar, like: http://uk.wikipedia.org/wiki/%D0%92%D1%96%D0%BA%D1%96%D0%BF%D0%B5%D0%B4%D1%9... ... and instead showing stuff like: http://uk.wikipedia.org/wiki/%D0%92%D1%96%D0%BA%D1%96%D0%BF%D0%B5%D0%B4%D1%9... (and if that URL gets mangled by some email software, it was a 9 letter Ukrainian word, written in a non-ASCII alphabet). But the point is, if you spoke Ukrainian, you could probably read the second version, versus having no hope of reading the urlencoded version. Of course, there are security concerns about non-ASCII alphabets that contain characters that look similar to ASCII ones, especially in the domain name portion, but presumably these can be resolved somehow (e.g. there's something similar in operation now I think for detecting very similar looking Wikipedia usernames, including using non-ASCII chars).
All the best, Nick.