SEO's Toolbox

by Nico Steiner

17 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,754 reviews

2,430,230 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 202 reviews

644,725 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 621 reviews

733,545 users

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 152 reviews

189,082 users

View HTTP headers of a page and while browsing.

YSlow by YSlow

Rated 3 out of 5 stars 176 reviews

122,150 users

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.

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 205 reviews

67,479 users

Seoquake is a Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO), social media optimization (SMO) and internet promotion. Seoquake allows to investigate many important SEO parameters.

Html Validator by Marc Gueury

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

For Firefox 23+, you need 0.958 (under review)
http://users.skynet.be/mgueury/mozilla

ShowIP by ShowIP Dev Team

Download Now

Experimental

Rated 3 out of 5 stars 280 reviews

94,886 users

Show the IP address of the current page in the status bar. It also allows querying custom information services by IP (right click) and see location and avaiable vouchers for shopping sites. Additionally you can copy the IP address to the clipboard.

SearchStatus by Craig Raw

Rated 4 out of 5 stars 189 reviews

30,523 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.

LinkChecker by Kevin Freitas

Rated 4 out of 5 stars 76 reviews

19,571 users

Check the validity of links on any webpage.

Accessibility Evaluation Toolbar by Jon Gunderson

Rated 3 out of 5 stars 15 reviews

7,512 users

Support web developers in testing web resources for accessibility features.

KGen by Nicolas Froidure

Rated 4 out of 5 stars 26 reviews

6,989 users

KGen (Keyword Generator) allows you to see what keywords are strong on visited web pages for search engines.

Fangs Screen Reader Emulator by Peter Krantz

Rated 5 out of 5 stars 9 reviews

4,974 users

Fangs renders a text version of a web page similar to how a screen reader would read it. The ambition is to help developers understand how an assistive device would present a website and thereby increase chances of finding accessibility issues early.

SenSEO by Nico Steiner

Rated 4 out of 5 stars 41 reviews

8,335 users

SenSEO is an extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria.

Operator by Mike Kaply

Rated 4 out of 5 stars 34 reviews

2,827 users

Operator leverages microformats and other semantic data that are already available on many web pages to provide new ways to interact with web services.
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