If you are tired of the same look and feel of Google services i.e. Gmail, Google Calendar, Google Reader and Google Docs then this extension has been designed for you. This extension gives Google services a new look and feel by installing themes for Google services.

Here’s what Gmail looks like after wearing this skin.

  


And how GCal looks


Google redesigned is a product of Globex Designs and is freely available for all platforms using Firefox.
To install this extension, follow the links.


If you are a web developer or web designer then this extension is only designed for you to make your development simple, easy. You must install firebug which is a Firefox extension. Firebug offers you a wide range of functionality to
  •  Inspect HTML and modify style and layout in real-time
  •  Use the most advanced JavaScript debugger available for any browser
  •  Accurately analyze network usage and performance
  •  Extend Firebug and add features to make Firebug even more powerful
  •  Get the information you need to get it done with Firebug.
     
    Other features that this extension offers are
    •        Monitor and analyze network performance, to understand what elements might be slowing your website down.
    •   Inspect the HTML code by viewing the source of any page in real time, filtering specific elements and editing them if necessary.
    •   Inspect and edit CSS and JavaScript as well.
    •   Test your pages to see if they contain errors, and debug them with the help of Firebug.
    •   Use the Firebug rulers and boxes to analyze and optimize the layout on your pages.
     Try Firebug here

    Firefox: Download Here

      Web Developer is a collection of various tools designed for web developers. Using this extension, developers can get information of every page content i.e. size, attributes, colors, div arrangement, CSS information and many more that you have ever expected. You can highlight elements i.e. block-level ones and tables. 
      There is a ruler utility to measure anything on page, allow you to validate CSS and HTML code on page, view source. You can use it to enhance the look of poorly designed pages, analyze the div structure of page , linearize the page , chose the font color, background etc. resize the images, get information about images their dimensions, size and type. This extension provides a new feature that makes the development much more faster. It provides facility to edit the CSS and HTML at the browser and save these changes and preview the page.
      This extension installs a toolbar below the address bar that gives you access to the tools.
      This extension is can be downloaded for Firefox and Google chrome.

      You can download it using address given below.
      Firefox: Download Here
      Chrome: Download Here