There has been several blogs that lists the best Firefox extensions that are out there. Since Pingdom are operating in the web performance and monitoring field we decided to make our own list of valuable Firefox extensions.

In this list we don’t cover the well known extensions such as Web Developer Toolbar and Firebug but rather focused on “lesser known” ones that can help development and testing. Extensions that deal with HTML, CSS, SEO and design were also ignored since other blogs have already made good lists of these kinds of tools.

Let’s get on to the list.

YSlow

YSlow has received great attention which is hardly a surprise since it’s such a good tool. It can analyze web sites and give you information about all requests that are made, load time, component sizes and also give you tips on how you can improve the speed of your web site. This extension requires that Firebug is installed.

Jiffy Firefox Extension

Jiffy is a new extension which gives a more detailed view of Javascript time measurements. You can get information of AJAX requests and other Javascript functions. The extension is based on Jiffy-Web Suite. This extension requires that Firebug is installed.

Firecookie

Using Firecookie you can view and manage cookies. It also has a console where you can see when cookies are created, changed or deleted. This extension requires that Firebug is installed.

Live HTTP Headers

Live HTTP Headers as the name says lets you view the headers sent by the web server. This can be useful when debugging web applications. It also lets you edit request headers and replay a request.

HttpFox

HttpFox monitors and analyzes all incoming and outgoing http traffic between the browser and the web server. It displays all request and response headers, sent and received cookies, querystring parameter, POST parameters and response body.

Poster

Poster is a tool for interacting with web services and other web resources and analyze the result. You can make HTTP requests and edit the body and content type and then inspect the result.

DNS Cache

This extension lets you easily disable and enable the DNS Cache in Firefox.

TestGen4Web

TestGen4Web is a tool that lets you record actions in Firefox to a XML file which can later be played back. The output can also be translated into formats so the recorded tests can be processed in other software as automated test scripts.

Selenium IDE

Selenium is a test tool for web applications where Selenium IDE is the recorder, much like TestGen4Web. It can record and playback actions and save the recordings as different scripts.

For more Firefox extensions for web development and design, see the following blogs:

• Top Best 50 Firefox Extensions for web design
• 10 Must Have Web Development Firefox Extensions
• 30+ Firefox Add-ons for Web Developers & Designers

Want to see how your favorite US sports site is doing, if it has a perfect 100% uptime score or not? If you want to check the latest scores and it isn’t working, could it be a problem with your computer or connection, or the site? We’ve got the solution for you!

For some time now we’ve been monitoring 34 major US sports and news sites related to sports. Our recent articles on the Super Bowl are a result of that monitoring.

Now you can look at how these sites are doing yourself on the public reports page for this list of US sports websites.

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Who has not used Google Maps? Raise your hand! Since the launch 7 years ago, Google Maps has become the de facto map service that users around the world go to for all their mapping needs.

As we say Happy Birthday to Google Maps, read on to find out some of the critical milestones in its history, and some amazing numbers and statistics.

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In 2010, there were just over 1 million secure Internet websites worldwide. Almost half of those, or 446,992 to be exact, were located in the United States.

But in which country can we find the most secure websites in relation to population? The answer may surprise you.

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The New England Patriots held what seemed to be a commanding lead (17-15) with five minutes left of Super Bowl XLVI last night. But the New York Giants came back and managed to win with 21-17.

As exciting as the game sounds, we missed the whole thing, instead spending our time watching the Superbowl.com website.

It turned out to be a rather dull thing to do because the site held up well and there was no downtime at all. The response time also didn’t give away anything significant in terms of online Super Bowl traffic.

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As Super Bowl 46 is approaching, fans will flock to the Lucas Oil Stadium in Indianapolis, Indiana, and to TV sets around the world to follow the New York Giants battle it out with the New England Patriots.

Kickoff is scheduled for 6:30EST on Sunday, February 5, and we’re already monitoring Superbowl.com to see how the site will handle the event.

What team will win Super Bowl 46? How will the site cope? We can only wait to find out.

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