Most Internet users see Firefox as a Web browser but many people use it as a work tool. If you work online, you probably spend a lot of time reading your emails, doing some research, using all sorts of Web tools… Here is a list of Firefox add-ons that can help you increase your work productivity:

Best Firefox Add-ons For Internet Professionals

MeasureIt – MeasureIt is a very convenient add-on that allows you to draw a ruler across any page to check the width, height and alignment of elements in pixels. With this Firefox add-on you can for example quickly check the width or height of a banner advertisement.

FoxClocks – FoxClocks allows users to easily keep an eye on the time around the world. With FoxClocks you can choose locations and place clocks in your add-on bar, so you know the time in all those locations. If you have staff all around the world, this add-on is a must have!

Alexa Sparky – With Alexa Sparky you can integrate Alexa data in your Web browser, so you can for example easily see the six-month traffic trend and traffic rank of any site in your add-on bar. This is a quick and easy way to monitor the traffic of your competitors.

Awesome Screenshot – With Awesome Screenshots you can easily capture a page or portion of a page, annotate it with circles, rectangles, arrows and text, blur sensitive information, and most importantly upload it and share it in just a few clicks. Awesome Screenshots is a great alternative to Jing and Skitch.

FlagFox – FlagFox is an add-on that displays a country flag depicting the location of the current site’s server and provides you with a multitude of tools such as safety checks, ‘WhoIs’, translation, similar sites, validation, URL shortening, and more…

FireFTP – FireFTP is an FTP/SFTP client for Firefox which provides you with an easy and intuitive access to FTP/SFTP servers. This Firefox add-on is very useful if you often have to upload or download elements. With FireFTP you can now do this from your Web browser.

SEO Toolbar – If you’re into SEO (short for Search Engine Optimization), then you should install SEO Toolbar, so you have access to a range of very useful tools. With this Firefox add-on you can for example see the PageRank or number of links indexed in Yahoo! (among many other indicators) of any page.

FireBug – FireBug is a Firefox add-on for Web developers which puts a wealth of Web development tools at your fingertips while you browse. You can edit, debug, and also monitor CSS, HTML, and JavaScript live in any page… A must have for Web developers.

If you have more add-ons in mind, feel free to leave a comment below!