Safari App Extension - localizing NSHumanReadableDescription

I have a Safari App Extension which I am localizing from English in to German. The final string I would like to localize is the description shown in Safari's Extensions preference tab. This is documented to come from the NSHumanReadableDescription key of Info.plist.


Unfortunately, I have been unable to figure out how to use InfoPlist.strings to change it. In the Info.plist I have the folowign section for testing purposes:


  <key>NSHumanReadableDescription</key>
  <string>INFOPLIST: Description</string>


In the Base.lproj's InfoPlist.strings I added:


NSHumanReadableDescription = "ENGLISH: Description";


but I still see "INFOPLIST:Description" in the Extensions tab. I have also tried:


"NSHumanReadableDescription" = "ENGLISH: Description";


and even:


"INFOPLIST: Description" = "ENGLISH: Description";


None of which helps.


It is possible to localize the description? Should I file a bug?


Thanks,

Nick