Here I have listed 33 useful and important Firefox extensions for SEOs, Developers and Users.

1. ColorZilla:

ColorZilla is very useful extension for designers. With ColorZilla you can get a color reading from any point in your browser, quickly adjust this color and paste it into another program. You can Zoom the page you are viewing and measure distances between any two points on the page. The built-in palette browser allows choosing colors from pre-defined color sets and saving the most used colors in custom palettes. DOM spying features allow getting various information about DOM elements quickly and easily. And there’s more…

2. Search Status:

Search Status extension is very useful for SEOs. Search Status extension display the Google PageRank, Alexa rank and Compete ranking anywhere in your browser, along with fast keyword density analyser, keyword/nofollow highlighting, backward/related links, Alexa info and other SEO tools.

3. SEO for Firefox :

SEO for Firefox is very useful extension for SEOs. It is very useful for competitor analysis in Google and Yahoo. Through this tool we can get the data like PR, Age of the Website, Links, .edu link, .edu page link, .gov link, Page links, del.icio.us, Technorati, Alexa, Cached, Dmoz, Bloglines, dir.yahoo.com and WhoIs of the website.

4. RoboForm :

RoboForm is very Useful extension for link builder. RoboForm is Top-rated Password Manager and Web Form Filler that completely automates password entering and form filling. Features of Roboform:

• Memorizes your passwords and Logs You In automatically.
• Fills long registration and checkout forms with one click.
• Encrypts your passwords to achieve complete security.
• Generates random passwords that hackers cannot guess.
• Backs up your passwords, Copies them between computers.
• Gives you one set of bookmarks and passwords for IE, Firefox, Mozilla, AOL, MSN, Avant, MaxThon browsers.
  

5. Google Toolbar :

As SEO you all know about Google Toolbar. Google Toolbar is very useful toolbar for SEO. Through Google Toolbar you can check the PR of the website; also you can get the search result from google.com, Google USA and Search from any site. Also there is lot of facility available related to Google like Google Bookmark, Google Translation and more…

6. In Form Enter:

InFormEnter is another useful tool for link builder. Through this extension you can increase the speed of your submission work. InFormEnter adds a small, clickable icon next to every input field in a web form, from where you can select the item to be inserted – no typing required. You can configure it to display your frequently used information such as name, email, address and whatever else you want to be available from the form menu.

7. Total Validator:

Total Validator is useful tool for SEOs and Developers. Total Validator provides true HTML validation (HTML 2.0 to XHTML 1.1) using the official DTDs, plus added attribute checking. So you no longer have to put up with the limitations of the W3C validator (no type checking) and tools like HTML Tidy which interpret the standards incorrectly (they don’t use the official DTDs).

8. FoxLingo:

FoxLingo is the ultimate language Tool! Web Page Translation, Translated Search, Auto Translation, Text Translation, Language Resources, Learning Languages, etc. FoxLingo supports 45 languages of the world. FoxLingo uses 34 free online web page translator services.

9. Web Developer:

Web Developer extension is useful for web developer. Through this tool you can Adds a menu and a toolbar with various web developer tools like CSS, Cookies, Forms, Images etc.

10. Del.icio.us Post:

del.icio.us extension Posts current page or link to del.icio.us. Adds an entry to the context menu and a button to the toolbar.

11. Digg This:

The Digg This! extension speeds up the process of submitting stories to the news website digg.com.

12. IE Tab:

This is a great tool for web developers, since you can easily see how your web page displayed in IE with just one click and then switch back to Firefox.

13. Performancing:

Excellent extension for bloggers. Performancing, allows you to instantly blog comments you made to any of the major blog systems, or even your own (if your blog supports Moveable Type or WordPress).

14. RankQuest SEO Toolbar:

RankQuest SEO (Search Engine Optimization) Toolbar provides you quick access to more than 30 intuitive SEO tools. Alexa Rank and Page Rank provided by Alexa and Google respectively ensures the popularity of the site. Once you download and install the SEO Toolbar you are only one or two clicks away from carrying out most of your day to day SEO operations.

15. StumbleUpon:

With StumbleUpon you can also connect with friends and share your discoveries, meet people that have similar interests, and check out what other people are discovering.

16. VideoDownloader:

Video Downloader is an extension that allows you to quickly download video files from video sites like youtube, google video etc. You can save the video and play it locally if you have the correct video player. You can usually download freeware video players for the various formats but you can also convert the video formats.

17. Link Counter:

Display a count of links of a web page and frames. Group and highlight links by type. Links type to count/group: empty, files, targets, anchors, feeds, javascripts, mails, ‘xfiles’, internal and external.

18. SEO Link Analysis:

SEO Link Analysis extension is useful tool for SEOs. This Firefox extension gives you a bit more information when opening such pages, it gathers the PageRank for the linking page, the anchor text used on the link, and checks whether the link is nofollowed or not.

19. PDF Download:

PDF Download solves the problems everyone has about handling PDF files with Firefox. Allows to choose if you want to view a PDF file inside the browser (as PDF or HTML), if you want to view it outside Firefox with your default or custom PDF reader, or if you want to download it!

20. Firefox Environment Backup Extension (FEBE):

FEBE allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up — It will actually rebuild your extensions individually into installable .xpi files. Now you can easily synchronize your office and home browsers.
FEBE backs up and restores your extensions, themes, and (optionally) your bookmarks, preferences, cookies. And much more.

21. GooglePreview:

Inserts preview images (thumbnails) of web sites and Amazon products into the Google and Yahoo search results pages. When you use GooglePreview and click on an Amazon link within the search results, you support me and the further development of the extension and back end if you actually purchase a product. The GooglePreview thumbnail system currently consists of 5 dedicated servers and generates 4.5 TB of traffic per month.

22. iMacros for Firefox:

iMacros is very useful extension for developers. It is useful for creating automated macros for online work like directoris submission gathering any data from any website etc.

23. Boost for Facebook:

Join the 100K+ Boost users and customize your Facebook experience with custom skins, 30+ special features, selectable options, pop-up notifications, an integrated toolbar, custom album viewers, hidden access and more…

24. Firefox Showcase:

Firefox Showcase is a Mozilla Firefox extension that will show all opened browser tabs as thumbnails. This view can be opened in a new window, tab or sidebar, and provides several functionalities to interact with them, like a find bar, zoom mode, keyboard navigation, multiple thumbnail selection or “drag & drop”.

25. Orkut Scrapper:

This extension helps Orkuting easier! . This has lots of features which enables scrapping easier. Some of the features are Toolbar ,Shortcut Link Access, Secret Scraping,Universal Background , Font Styles, Live Preview, Translation Tools, Support for Post/Profile Styling, Image /Flash/YouTube, Signature, AutoLogin etc.

26. Snap Shots:

Through this tool you can see the snap shot of any link in your browser. Snap Shots™ is now available as a browser add-on, so you can bring Snap Shots with you to the rest of the Internet, enhancing your browser experience with the right content at the right place and time. This extension is work with the Firefox, Internet Explorer and safari browsers.

27. Show IP:

Show the IP address of the current page in the status bar. It also allows querying custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft. Additionally you can copy the IP address to the clipboard. This extension was formerly known as ipv6ident.

28. Inbound Link Quality Extension (ILQ):

ILQ (Inbound Link Quality) extension is very useful extension for SEOs. This tool give you the ILQ rating of the current site showing in your FF browser. This tool shows the number of inbound dir.yahoo, dmoz, edu and gov links the current site has.

29. Adsense Notifier:

Displays your Adsense earnings on the statusbar.

30. Live HTTP Headers:

View HTTP headers of a page and while browsing.

31. Greasemonkey:

Greasemonkey is an excellent extension for Firefox, which allows simple javascripts to be used on pages to alter the content.

32. Firebug:

Firebug is also useful tool for web developer and SEOs. 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.

33. Google Global:

Google Global extension now allows you to view organic and paid Google search results as they appear in almost any location on Earth.

Hi friends, sorry for the delay post. Actually I was busy in my friend’s marriage. So today here I have posted the information on Google’s Advance Search Operators. Which are very helpful for getting particular information from Google.

Basic Search Operators Examples

Query : SEO Services

You can find the pages containing the words SEO and Services

OR Search

Query : SEO OR SEM

Exact Phrase Search

You can find the pages containing information on SEO OR SEM

Query : “I Love You”

You can find the pages containing exact phrases of I Love You

Query : British –library

You can find the pages containing the word British but NOT the word library

Synonym search

Query : SEO ~glossary

Through this command you can finds the pages containing glossaries about SEO, as well as dictionaries, lists of terms, terminology, etc.

Query : data-entry

Through this command you can find the pages containing all forms of the term, if spelled as a single word, a phrase or hyphenated.

Query : define:popular

Through this command you can find the different definition of the word popular

Calculator Search Operators

Basic Arithmatic

Query : 15 + 30 – 32 * 2 / 4

Percentage of

Query : 22% of 40

Raise to a Power

For this you can use two types of search operators

Query : 3**7

OR 3^7

Convert units

Query : 1000 Euros in Pound

Query : 160 lbs in kg

Query : 48 in hex

Restrict Search

Flight Search

City 1 City 2

Query : Ahmedabad Singapore

Through this command you can finds the result that contains book flights from Ahmedabad to Singapore. Here you can add any of two country or city for know the information about flight between that two cities.

Domain search

Site :

Query : site:www.searchenginecity.org

Through this command you can get the result of pages that crawled by the Google.

“+” search

Query : Star Wars Episode +I

Through this command you can find the pages of Star Wars Episode I.

Numrange search

[#]..[#]

Query : mobile $350..$600

Through this command if you want to search within a range of numbers at that time this operator is useful for you. You can also use year and any numerical value to search within a range of numbers.

Specific File Search

Filetype: OR ext:

Query : SEO Tutorial filetype:pdf

Query : SEO Tutorial ext:pdf

Through this command you can find the result of pages in particular file type.

Backlinks Search

Link:

Query : link:www.searchenginecity.org

Through this command you can find the linked pages (backlinks) of that particular site.

Fill in the Blank “*” Search

Query : insulin was invented by *

Sometimes the best way to ask a question is to get Google to ‘fill in the blank’ for you. You can do this by adding an asterisk “*” in the part of the sentence or question that you want filled in.

Specialized Information Queries

Book OR books

Query : book online marketing

Through this command you can find the books related to online marketing. (Here no need to add colon(;) after book. )

phonebook:

Query : phonebook: McDonald’s WA

Through this command you can find the result of phone numbers of McDonald’s in Washington.

rphonebook:

Query : rphonebook: Tushar Patel GA

Through this command you can find the residential phone no of Tushar Patel, who is living in Georgia (GA)

Movie:

Query : movie: titanic

Through this command you can find the information about Titanic Movie, with reviews, Showtime etc.

Stocks:

Query : stocks: goog

Through this command you can find the current stock price of Google

Weather:

Query : weather: ahmedabad

Through this command you can know the weather of any city.

Alternative Search Operator

Cache:

Query : cache:www.searchenginecity.org

Through this command you can find the Google’s cached version of a Search Engine City home page.

Info: OR id:

Query : Info:www.searchenginecity.org

Through this command you can find the info about a Search Engine City

Related:

Query : related:www.searchenginecity.org

Through this command you can find the list of web pages that are similar or related to the Search Engine City.

SEO Related Search Operators

Allinanchor:

Query : allinanchor:buy Viagra

Through this command you can find the pages that are called buy Viagra by others, means all query words must appear in anchor text of links to the page.

Inachor:

Query : seo services inanchor:freelancer

Through this command you can find the pages on SEO Services for which links to the page say they are “freelancer”. Terms must appear in anchor text of links to the page.

Allintext:

Query : allintext:services seo sem

Through this command you can find the pages for services with SEO and SEM keywords. All query words must appear the in text of the page.

Intext:

Query : matt cutts intext:google

Through this command you can find the pages mentioning Matt Cutts where, Google is included in the text of the page.

Allintitle:

Query : allintitle:seo services

Through this command you can find the pages with titles containing “SEO” and “Services” keywords. All keywords must appear in the title of the page.

Intitle:

Query : Social Bookmarking intitle:top ten

Through this command you can find the pages with the words Social and Bookmarking that inclue top ten in the title of the page.

Allinurl:

Query: allinurl:seo services

Through this command you can find the pages containing the words SEO and Services in the URL. All keywords must appear in the URL.

Inurl:

Query : seo inurl:blog

Through this command you can find the pages in which the URL contains the word blog. The term must appear in the URL of the page.

Search Operators of Google Groups

Author:

Query: Search Engine author:Will Spencer

In Google Groups through this command you can search the articles on Search Engine, which are written by Will Spencer

Group:

Query : Search Engine group:alt.internet.search-engines

Through this command you can find the group messages of Search Engine from the alt.internet.search-engines group.

Insubject:

Query : insubject:seo

Through this command you can find the articles containing SEO in the subject line.

Search Operators of Google News

Location:

Query : SEO location:india

Through this command you can find the SEO news from India.

Source:

Query : source:informationweek

Through this command you can find the articles from the site Information Week

Search Operators of Froogle

Store:

Query : shoes store:reebok

In Froogle through this command you can find the shoes from the Reebok Store.