Got frustrated with the latest version of firefox, version 40. This is getting worst. The bug found is that the line numbers are off, incorrect when using the inspector. The inspector is very important tool to debug and modify the style and script of a webpage. Then the inspector tells me that the style of the span element is in line 20 and the actual line number of the element is actually 340. Good grief. The offset is different for different webpage. Do not know how firefox screwed up the line numbers. The line numbers works in Chrome and Opera. I will switch the browser and goodbye firefox if you are not fixing the bug.