Firebug is a free and open-source, complete and powerful Web development auxiliary plug-in for Mozilla's Firefox. The same as Chris Pederick's Web Developer, it added plentiful website designing, developing and testing tools at our fingertips. Web developers can use it to debug, edit or even delete HTML, CSS, DOM, and JavaScript code of any website.

In Windows Explorer and some cases, we maybe need to copy many names of a bunch of files/folders one by one. There is only one traditional method - manually click files/folders and then copy/paste their names; and it would become more troublesome if you want to get their full paths - you have to right click every file/folder to enter its properties and then copy the full path from the 'Location' field.

Individually put some frequently listened music files in a folder and then play them, this is the conventional way of playing songs on your hard disk. But if these music files distributes in multiple folders, then it needs us to enter into these directories to play. Moreover, in this playing process, it is always impossible to play according to the sequences of track title, file bit rate (i.e. the quality of music files), album title and so on. This brings user a lot of inconvenience in deed...

A lot of people like Mozilla Firefox Web Browser, a big part of the reason is that it is very easy to satisfy all kinds of user needs through various plugins. But at least for the operability of single Firefox, there are still many deficiencies, such as some personal applications.

Windows Explorer builds in few functions, so many users would install a new Windows Explorer alternative software, such as Total Commander, although they are very powerful, yet one weakness is that they cost too many system resources and have to be familiar with the new interface and operation.