Firebug is a browser plug-in specifically for Mozilla Firefox. Once you install the plug-in, available at http://www.getfirebug.com, it appears as a small icon in the upper right of your Firefox browser window as below shows.
What’s interesting about Firebug is that not only can you highlight different elements of a web page to see the associated HTML and CSS code, you can also edit the code and see what happens – live! For example, as illustrated in below, if I change the name or source path of an image, I can see immediately what would happen.
In this case, the image is not found and all I see is the “alt” text “Front Row”. Don’t worry about making changes that break the page; your changes will not affect the actual source code. It’s simply a way for you to
Firebug is also an excellent way to troubleshoot your own web pages. For example, let’s say you used
Dreamweaver to build a page. Once you upload it to your server and see the page through the Firefox browser, you may see CSS layout or alignment issues. With Firebug, you can enter different padding, margin, and offset values until the page looks right. You can then go back into Dreamweaver and enter the code that worked best and re-upload the page to your server
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