rem: BrowserBack(); 
add: switch (gPrefService.getIntPref("browser.backspace_action")) { case 0: BrowserBack(); break; case 1: goDoCommand("cmd_scrollPageUp"); break; } 
context: function BrowserHandleBackspace(){  BrowserBack();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/902a193268c533be70ade09fc7cb9b5835f10e0a/browser.js/buggy/browser/base/content/browser.js