Last time I presented you 3 must-have IE add-ons that I use for design and development. This time I’ll show you 13 helpful Firefox add-ons that I also use.
This is a simple hover CSS property viewer. Simple, but yet – very useful.
This tool enables you to pick up a color from any point in your browser and reuse it in other applications.
Creates a color palette for Photoshop, Paint Shop Pro, GIMP, Flash, Fireworks, or OS X based on the current page.
Screengrab! saves entire webpages as images. It will save what you can see in the window, the entire page, just a selection, a particular frame…
Draw out a ruler to get the pixel width and height of any elements on a webpage.
Displays formatted and color-coded source and optional CSS information for each element. You can see exactly which CSS rules match for an element. The rules are displayed including file name and line number.
Adds a menu and a toolbar with various web developer tools.
This extension will allow you to easily control cookie permissions. This is a lighter, scaled down version of CookieSafe. It contains less features, but is considerably easier to use.
All browsers include a “View Source” option, but none of them offer the ability to view the source code of external files. You can use the JSView extension to solve the problem.
Shows you the GET and POST parameters of the current website in the sidebar. You can alter their values, add new parameters, switch get/post and more.
Regular Expressions Tester offers developers functions for testing their regular expressions.
The Tool includes options like case sensitive, global and multiline search, color highlighting for found expressions, a replacement function incl. backreferences, auto-closing of brackets, testing while writing and saving and managing of expressions.