Mark's New Pinyin Input Firefox Extension by John Pasden in language 11 Feb 2009 My friend Mark has created a FireFox addon. It does one thing and it does it well: it converts onscreen text from numeral pinyin to pretty pinyin with tone marks. (It doesn’t convert characters to pinyin or any of that jazz.) I find this very useful. If it sounds good to you, try out the Pinyin Input Firefox Extension. Share Chinese studyFirefoxMarkpinyin John Pasden John is a Shanghai-based linguist and entrepreneur, founder of AllSet Learning.