Fireshot is one of the best screen capture add-in for Firefox. Unlike other screen capture extensions this plug-in provides a set of editing and annotation tools, which let users quickly modify web captures and insert text annotations and graphical annotations. Such functionality will be especially useful for web designers, testers and content reviewers.
“Autopager” is a timesaving Firefiox Add-In which automatically loads the next page of a site inline when you reach the end of the current page for infinite scrolling of content.
By default AutoPager works with a ton of sites, including Lifehacker, the New York Times, Digg, and, of course, Google. If you want to add your own custom autopaging to unsupported sites, the site wizard feature makes it easy
Many times you find Firefox Download Manager dialog annoying when you are downloading files one by one and it keeps notifying about the download by poping up in front of the screen.
You can hide this dialog and let the download progress in the background. Still you can access the download dialog from the Tools->Downloads menu or double click the statusbar if download is in progress.
Follow below steps to disable Download Dialog:
CoolPreviews is one of the most popular Firefox add-in which enables you browse web with ease. With CoolPreviews you can view Google & Yahoo Image Search in ultra sideshow mode. It also allows you to preview links without clicking, giving you the power to browse the Web faster. Just mouse over any link, and the preview window immediately appears to show you the content.
Another useful Add-in especially for people who are in web development or designing. Using Measure it you can get height and width of any elements on a web page.
PDFescape Firefox Extension allows you to quickly open PDF files online inside of PDFescape (instead of your default PDF reader). By opening PDF files online in PDFescape, Firefox users no longer need Adobe Reader or any other PDF reader.
PDFescape is able to edit PDF files, fill out PDF forms, add form fields and hyperlinks to files, print & view PDF files, rearrange pages, completely remove pages from files, and much more.
No additional software or registration is required for editing. After edit you can save PDF file to you local hard drive.
A stuck pixel results from a manufacturing defect, which leaves one or more of sub-pixels permanently turned on or off. A stuck pixel will usually be most visible against a black background, where it will appear red, green, blue, cyan, magenta, or yellow, although stuck red, green, or blue pixels are most common.
Another useful Firefox add-in "Media Converter" lets you download and convert your favorite videos online. List of supported websites is below:
Another useful Add-in for Firefox from seobook.com. You can see useful market research data for the page you are browsing or in yahoo/google search results. You can enable or disable the extension by a single click(icon at statusbar) when it is not in use.
The extension provides below data :
* PR: (Google PageRank)
* Age: age pulled from Archive.org.
* Links: (Yahoo! linkdomain)
* .edu Link: (Yahoo! .edu linkdomain )
* .edu Page Link: (Yahoo! .edu link )
* .gov Link: (Yahoo! .gov linkdomain )
* Page Links: (Yahoo! link)
* del.icio.us: number of times a URL has been bookmarked on Del.icio.us.
* Technorati: an estimate of the total number of links to a site from blogs
* Alexa: rank based on website traffic .
* Cached: (Google site:)
* dmoz: listings at dmoz.org
* Bloglines: shows you how many people are subscribed to a particular blog via Bloglines.
* dir.yahoo.com: is a site listed in the Yahoo! Directory or not.
* WhoIs: makes it easy to look up the whois data for any site.
Console² let's you display errors filtered by type (Errors, Warnings, Messages), language (JavaScript, CSS, XML) and context (Chrome, Content). Furthermore it provides a simple search box (as seen in the History and Bookmarks sidebars) and some accessibility improvements. You can also send JavaScript debug messages to Console², find more details Console².
Awesome add-on for firefox which helps you safer surfing. WOT, Web of Trust, is an online community for reputation rating that lets Internet users share their knowledge of websites, helping you stay in control when 
As you search with Google, you will see a tiny icon next to the Web link: green to go, yellow to slow down, red to stop. You can easily customize the protection level to your way of surfing the Web. WOT has information on 19 million websites. WOT ratings are shown also on Yahoo!, Gmail, Wikipedia, and other sites. No registration is required.
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing. The details of the errors are seen when looking the HTML source of the page.
The extension is based on Tidy and OpenSP. Both algorithms were originally developed by the Web Consortium W3C. And now extended and improved by a lot of persons. Both algorithms are embedded inside Mozilla/Firefox and makes the validation locally on your machine, without sending HTML to a third party server.
Visit CSSViewer homepage
Many times we need to open Firefox links in Internet Explorer may be because the site does not support firefox or is not able to properly render the content. This trick lets you open links in Internet Explorer from Firefox using FireGestures. FireGestures is a Firefox extension which enables you to execute various commands with five types of mouse gestures.
Steps to enable the feature:
Install FireGesture Add-in.
Install the script by dragging the Open Link with Internet Explorer link to FireGestures [Options] window. Custom scripts are available here.
Assign a mouse gesture to the script and you are ready to use the feature.
Jewels Master – Endless adventure and fun classic Jewel game as well as Arcade play mode. Jewel games are very simple to play. Just move t...
