CoffeeBreakers Webmaster Tools

by Mario Rinaldi

13 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,841 reviews

2,022,082 users

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...

Web Developer by chrispederick

Rated 5 out of 5 stars 249 reviews

447,776 users

The Web Developer extension adds various web developer tools to the browser.

Tamper Data by Adam Judson

Rated 4 out of 5 stars 142 reviews

101,055 users

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 312 reviews

248,272 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 358 reviews

130,967 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

HttpFox by Martin Theimer

Rated 4 out of 5 stars 170 reviews

81,266 users

An HTTP analyzer addon for Firefox

YSlow by YSlow

Rated 3 out of 5 stars 215 reviews

72,421 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. is the official open source website.

Firebug Autocompleter by yamapikarya

Rated 4 out of 5 stars 31 reviews

20,057 users

Firebug command line autocomplete.

Screengrab by Andy M

Rated 4 out of 5 stars 587 reviews

18,780 users

Screengrab! saves webpages as images... but not for new versions of Firefox.

FF changes too fast and I don't have the time to maintain it anymore. Bugs have developed that I am not in a position to investigate.

Therefore, Screengrab is EOL.

FireQuery by BinaryAge, Jan Odvarko

Rated 4 out of 5 stars 54 reviews

21,749 users

Firebug plugin for jQuery development

SearchStatus by Craig Raw

Rated 4 out of 5 stars 193 reviews

17,629 users

Display the Google PageRank, Alexa rank, Compete ranking and SEOmoz Linkscape mozRank anywhere in your browser, along with fast keyword density analyser, keyword/nofollow highlighting, backward/related links, canonical links, WHOIS, robots and more.

Change Hosts by Marco Pelegrini

Rated 4 out of 5 stars 21 reviews

3,080 users

The ultimate "Hosts File" editor for Mozilla Firefox!
Change Hosts is a complete Hosts File editor, commonly used by developers to force a domain name resolution to a specific IP.

CSS Reloader by auchenberg

Rated 4 out of 5 stars 37 reviews

5,669 users

CSS Reloader is an extension that allows you to reload all the CSS of any site without you have to reload the page itself.

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