id summary reporter owner description type status priority milestone component version resolution keywords cc 8578 "this.getWindow().$.getComputedStyle(this.$, \""\"") is null" scott schmitz "I an seeing the following error: this.getWindow().$.getComputedStyle(this.$, \""\"") is null userAgent:Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0 The code in question is located at element.js line 502. I am recommending that the code change from: return this.getWindow().$.getComputedStyle( this.$, '' ).getPropertyValue( propertyName ); to return this.getWindow().$.getComputedStyle( this.$, '' ) ? this.getWindow().$.getComputedStyle( this.$, '' ).getPropertyValue( propertyName ) : null; that will fix the problem. thanks, Scott Schmitz." Bug closed Normal General expired Firefox