firefox

You'll find in this post useful free SEO plugins for Firefox. These add-ons aim at helping webmasters who deal with Search Engine Optimization (SEO).

Here is a collection of 10 SEO Firefox extensions:

1. SEO for Firefox

SEO for Firefox developed by SeoBook is definitely one of the most powerful Firefox SEO plugins. This add-on puts useful competitive research data directly in the search results of Google and Yahoo! Search.

For example, it pulls Google Page Rank (PR), number of links, delicious save counts, Alexa rank, WhoIs information, etc. You must register online to download the plugin (for free). SEO for Firefox extension can be turned on or off globally.

Once SEO for Firefox installed, your Google SERP will appear like below:

2. SeoQuake

SeoQuake is similar to SEO for Firefox. It is a powerful tool integrated in Firefox, so that users can view a large number of search engine parameters on the fly. Among parameters on Search Engine Result Pages, you'll be able to display Google PR, index (number of indexed pages), link (number of links, pointed to the current page) and similar parameters for many other search engines such as Yahoo and Baidu.

Once SeoQuake installed, your Google SERP will appear like below:

3. SearchStatus

SearchStatus is a plugin for Firefox displaying numerous parameters such as PR, Alexa rank, Compete ranking and SEOmoz Linkscape mozRank anywhere in your browser, along with fast keyword density analyser, keyword/nofollow highlighting, backward/related links, Alexa info and more.

4. SenSEO

SenSEO is a Firefox extension checking the most important on-page-SEO-criteria and calculating a grade of how good your site fulfills these criteria. It is integrated with the popular Firebug web development tool. SenSEO checks notably:
- Correct usage of Document-Title, Meta-Description and Meta-Keywords;
- Headlines, Domain and URL-Path;
- Other general content-criteria.

5. SEOpen

SEOpen offers a Firefox add-on providing quick access to some web-based tools to help with SEO. You can quickly check inbound links, PageRank, http headers, and much more. You can right-click on an open area of a web page or use the included toolbar.

6. Rank Checker

Rank Checker is another tool from SeoBook. This tool can track and record search engine ranking for a page in Google, Yahoo and Bing. The results are saved in the PC, so there is no need to worry about the privacy issue.

7. Link Diagnosis

Link Diagnosis Firefox plugin allows users to see Google PR and anchor text of every backlink, most popular anchor texts and charts with breakdown of PR and link types.

8. SEO Link Analysis

SEO Link Analysis show the PR of the linking page, the anchor text and whether the link is followed, nofollowed or no longer exists.

9. Google Global Firefox extension

Google Global is a Firefox add-on that allows you to easily see what any Google search results look like in outer countries, cities and zip codes exactly as if you were in that location. This extension is unobtrusive and the functions are only available when on a Google search results page so it will not clutter up your menu bar, right click menu or slow down your browser.

10. 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 browsin.

If you're interested in other SEO tools, here are 25 SEO Tools and Ebooks.

Feel free to share with us other SEO tools.