semi-nerd.de

This is my list of recommended Firefox AddOns.

Firebug

“Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page. ”

Adblock Plus

“Ever been annoyed by all those ads and banners on the internet that often take longer to download than everything else on the page? Install Adblock Plus now and get rid of them.”

NoScript

“It allows JavaScript, Java and other executable content to run only from trusted domains of your choice, e.g. your home-banking web site, and guards the “trust boundaries” against cross-site scripting attacks (XSS).
Such a preemptive approach prevents exploitation of security vulnerabilities (known and even unknown!) with no loss of functionality…
Experts do agree: Firefox is really safer with NoScript ;-)”

Web Developer

“Adds a menu and a toolbar with various web developer tools.”

Html Validator

“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.”

Tab Mix Plus

“Tab Mix Plus enhances Firefox’s tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager with crash recovery that can save and restore combinations of opened tabs and windows.”

Firefox Showcase

“Showcase provides a new way to manage your Firefox tabs and windows by showing them as thumbnails in a single window, tab or sidebar. Includes a find bar that will filter the thumbnails, and the capability to select the thumbnails in the same way you would select files in your system.”

IE Tab

“This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox.”

Live HTTP Headers

“View HTTP headers of a page and while browsing.”

Modify Headers

“Add, modify and filter http request headers. You can modify the user agent string, add headers to spoof a mobile request (e.g. x-up-calling-line-id) and much more. Take a look at the help tab of the Modify Headers window.”

ColorZilla

“With ColorZilla you can get a color reading from any point in your browser, quickly adjust this color and paste it into another program. You can Zoom the page you are viewing and measure distances between any two points on the page. The built-in palette browser allows choosing colors from pre-defined color sets and saving the most used colors in custom palettes. DOM spying features allow getting various information about DOM elements quickly and easily. And there’s more…”

Screengrab!

“It will save what you can see in the window, the entire page, just a selection, a particular frame… basically it saves webpages as images.”

ChatZilla

“ChatZilla provides all the usual IRC client features: multiple servers, a built-in list of standard networks, easy searching and sorting of available channels, logging, and DCC chat and file transfers, plus easy customization with JavaScript plug-ins and CSS styling. ”

FoxyTunes

“Do you listen to Music while surfing the Web? FoxyTunes lets you control almost any media player and find lyrics, covers, videos, bios and much more with a click right from your browser.”

MeasureIt

“Draw out a ruler to get the pixel width and height of any elements on a webpage.”

Add N Edit Cookies

“Cookie Editor that allows you add, delete and edit cookies.”

YSlow

“YSlow analyzes web pages and tells you why they’re slow based on Yahoo’s rules for high performance web sites.”

Aardvark

“Powerful and user-friendly ’selector’ utility for selecting elements and doing various actions on them. It can be used for cleaning up a page prior to printing it (by removing and isolating elements), for making the page more readable, and (most appreciated by web developers), for analyzing the structure of a page.”