Working of JavaScript is sometimes so hard to understand on a web page. Which function will be called when you click this button or what AJAX query will be executed while you browse the page. It is not so easy to analyze this specially when the web 2.0 website is heavy on JavaScript code like Facebook, Gmail etc.
If you are a web developer then you must install JavaScript Deobfuscator addon. I was just amazed after seeing the results. It will show you the JavaScript being compiled or executed while its window is open and it is way too fast.
Just install JavaScript Deobfuscator. Run it from Tools Menu in Firefox and then load the page. It’ll show the executed scripts and compiled scripts in different tabs of its window. You can see the results live on the window.
If you are a small web developer not working much on JavaScript then you should also try Firebug which will give you a little hint when a JavaScript changes on your page flashing yellow color.
Or to see more comprehensive details how the data is getting fetched from web and how the JavaScript is getting executed and to analyze the speed of your web page, you may would like to see how it is done on Google Chrome.
This addon will also be very useful if you want to extract JavaScript code for particular function on a website or a blog.
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Great find mate. I will definitely use this to find out how the java scripts are working on my blog!
@Nihar: Definitely you should if you are a serious web developer!