- Awesome screenshot: Capture and Annotate 2.3.8
Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more! - British English Dictionary 1.19.1
British English Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey by David Bartlett. - ColorZilla 2.8
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies… - Console² 0.9
Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website. - CSS Usage 0.3.0
Firebug extension to view which CSS rules are actually used. - Download Statusbar 0.9.10
View and manage downloads from a tidy statusbar – without the download window getting in the way of your web browsing. - Dummy Lipsum 3.0.0
Generate “Lorem Ipsum” dummy text (from http://www.lipsum.com). - FireBreak 1.3
The easiest way to find the break points in your responsive designs. - Firebug 1.11.2
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… - FireShot 0.98.31
FireShot captures webpage screenshot in Firefox entirely (see the demo: http://bit.ly/RlBQMV)
The capture can be quickly annotated and: + Uploaded + Saved as PDF/PNG/GIF/JPEG/BMP + Sent to clipboard + Printed + E-Mailed + Exported - Garmin Communicator 4.0.4
The Garmin Communicator is an internet browser plugin that allows you to easily transfer data between websites and Garmin GPS devices. - Html Validator 0.9.5.1
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. - HttpFox 0.8.11
An HTTP analyzer addon for Firefox - MeasureIt 0.4.10
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels. - Save Images 0.8.7
Save Images saves the images from the current tab page, from the cache, to a specified location, with either the images original file name or a file name that you specify. The size and types of images saved may be chosen, with options if… - SnipR 3.0.0
Server Network IP Resolver : Discover where-on-earth the hosts of the websites are, which you visit. Total timeout for hideous web-servers! - Symbaloo bookmarker 0.103
Symbaloo is de simpelste start op het internet.
Door de Symbaloo bookmarker te installeren, kun je dankzij een extra knop in je browser eenvoudig elke website met 1 muisklik toevoegen aan je Symbaloo. - Web Developer 1.2.2
The Web Developer extension adds various web developer tools to the browser. - YSlow 3.1.4
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website. - FireQuery* 1.3
Firebug plugin for jQuery development - Pixel Perfect* 1.7.1
Pixel Perfect is a Firefox/Firebug extension that allows web developers and designers to easily overlay a web composition over top of the developed HTML.
*= ff uitgeschakeld