You can use Firebug generate logs. This is a great way to finding errors in a page.

You can use Firerbug to write and execute a JavaScript in realtime. This is a good way to test and make sure that the script is working properly before you deploy it in a production environment.

Using Firebug, you can test which file of your web page is causing the delayed loading of the page.

Firebug is a very powrful tool when it comes to finding and solving errors in code.

Inspect and edit CSS with Firebug. Right click on the element which you want to inspect and click on the Inspect Element.

In this tutorial, we are going to discuss how to inspect and edit HTML with Firebug.

Firebug tutorial of How to install, Inspect and edit HTML, Inspect and edit CSS,Debug and profile JavaScript,Execute JavaScript on the fly,Logging JavaScript,Explore DOM and Monitor network activity with Firebug.

JavaScript developers tools covering description, explanation, picture by w3resource.com