add: pbi.removeObserver(this.mTypeAheadFind.caseSensePref, this.mTypeAheadFind); 
context:   uninitFindBar: function ()  {    var prefService =      Components.classes["@mozilla.org/preferences-service;1"]                .getService(Components.interfaces.nsIPrefBranch);    var pbi = prefService.QueryInterface(Components.interfaces.nsIPrefBranch2);    pbi.removeObserver(this.mTypeAheadFind.useTAFPref,                       this.mTypeAheadFind);    pbi.removeObserver(this.mTypeAheadFind.searchLinksPref,                       this.mTypeAheadFind);    getBrowser().removeEventListener("keypress",                                     findBar_OnBrowserKeyPress, false);    getBrowser().removeEventListener("mouseup",                                     findBar_OnBrowserMouseUp, false);  },
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0d5038b0d83ce945ba7a4877327afa64682a153f/findBar.js/clean/toolkit/components/typeaheadfind/content/findBar.js