| Index: chrome/content/cssProperties.js | 
| =================================================================== | 
| --- a/chrome/content/cssProperties.js | 
| +++ b/chrome/content/cssProperties.js | 
| @@ -60,17 +60,17 @@ CSSPropertyFilters.prototype = { | 
| { | 
| var rules = stylesheet.cssRules; | 
| if (!rules) | 
| return; | 
| for (var i = 0; i < rules.length; i++) | 
| { | 
| var rule = rules[i]; | 
| - if (rule.type != this.window.CSSRule.STYLE_RULE) | 
| + if (rule.type != rule.STYLE_RULE) | 
| continue; | 
| var style = this.stringifyStyle(rule.style); | 
| for (var j = 0; j < this.patterns.length; j++) | 
| { | 
| var pattern = this.patterns[j]; | 
| var regexp = pattern.regexp; |