rem: urlSecurityCheck(this.imageURL, this.browser.contentPrincipal, Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT); 
add: var viewURL;  if (this.onCanvas) viewURL = this.target.toDataURL(); else { viewURL = this.imageURL; urlSecurityCheck(viewURL, this.browser.contentPrincipal, Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT); }  
context:   viewImage: function(e) {    urlSecurityCheck(this.imageURL,                     this.browser.contentPrincipal,                     Ci.nsIScriptSecurityManager.DISALLOW_SCRIPT);    var doc = this.target.ownerDocument;    openUILink( this.imageURL, e, null, null, null, null, doc.documentURIObject );  },
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/68f12858c0f4513eb69bb02d2b7c850de69d8f82/nsContextMenu.js/buggy/browser/base/content/nsContextMenu.js