rem: try { var type = branch.getCharPref("type"); var uri = branch.getComplexValue("uri", Ci.nsIPrefLocalizedString).data; var title = branch.getComplexValue("title", Ci.nsIPrefLocalizedString).data; this._registerContentHandler(type, uri, title); } catch (e) { return false; } return true; 
add: var type  = branch.getCharPref("type"); var uri   = branch.getComplexValue("uri", Ci.nsIPrefLocalizedString).data; var title = branch.getComplexValue("title", Ci.nsIPrefLocalizedString).data; this._registerContentHandler(type, uri, title); 
context:   _registerContentHandlerWithBranch: function(branch) {    try {      var type = branch.getCharPref("type");      var uri =           branch.getComplexValue("uri", Ci.nsIPrefLocalizedString).data;      var title =           branch.getComplexValue("title", Ci.nsIPrefLocalizedString).data;      this._registerContentHandler(type, uri, title);    }    catch (e) {      return false;    }    return true;  },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/a235098905dc66d69798a0875f1c79f8bbcdc3c2/WebContentConverter.js/clean/browser/components/feeds/src/WebContentConverter.js