Thank you for this wonderful option! I like it and use it often. No hassles what so ever up to the latest FF versions (as of 2015: 42).
1 Suggestion, however: would be cool to have a slightly different icon for the German search in Wikipedia! I imagine the German flag/colors placed into it !?
Would you mind to change the icon a bit, please, would be so even-more-wonderful!
+ works professionally with firefox 12
- (no demerit)