SEO's Toolbox

by Nico Steiner

17 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,696 reviews

796,667 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 4 out of 5 stars 491 reviews

258,656 users

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

Flagfox by Dave G

Rated 5 out of 5 stars 887 reviews

236,062 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...

SeoQuake SEO extension by SeoQuake Team

Rated 4 out of 5 stars 249 reviews

31,226 users

Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 216 reviews

65,639 users

View HTTP headers of a page and while browsing.

Html Validator by Marc Gueury

Rated 4 out of 5 stars 213 reviews

34,579 users

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Firefox 56, use 0.974 (see all versions below).
For Firefox 57, see Web Extensions.

ShowIP by Anonymous user f5ac7e

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Experimental

Rated 3 out of 5 stars 283 reviews

14,314 users

Shows the ip address and additional information about the remote host using ip2info.org.
Also Displays Information about your local internet connection.
Privacy note: Data on what host you visit is only sent when you enable remote data.

YSlow by YSlow

Rated 3 out of 5 stars 213 reviews

23,445 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.

LinkChecker by Kevin Freitas

Rated 4 out of 5 stars 86 reviews

7,782 users

Check the validity of links on any webpage.

SenSEO by Nico Steiner

Rated 4 out of 5 stars 44 reviews

1,815 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.

SearchStatus by Craig Raw

Rated 4 out of 5 stars 197 reviews

6,375 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.

Fangs Screen Reader Emulator by Peter Krantz

Rated 5 out of 5 stars 10 reviews

1,832 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.

Accessibility Evaluation Toolbar by Jon Gunderson

Rated 4 out of 5 stars 16 reviews

1,902 users

Support web developers in testing web resources for accessibility features.

KGen by Nicolas Froidure

Rated 4 out of 5 stars 30 reviews

1,361 users

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

Operator by Mike Kaply

Rated 3 out of 5 stars 37 reviews

488 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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