Firefox is known as the best web browser for bloggers, developers and web designers, firefox add-ons make it easy to access your favorite websites and other useful things which you like to use often.

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Below we are sharing 45+ top rated Firefox add-ons and plugins to improve your browsing experience, it may be possible that some peoples already aware few of them but I hope I’ve managed to include some that you might have missed.

Facebook Like – Share Any Page!

Easily share web pages you like with your friends and see how many people on Facebook like the page you are on!

Shareaholic

You’ll have all your favorite social networking, bookmarking, blogging, and e-mail services at your fingertips. With Shareaholic you’ll be able to share any page, anytime, with services you already love like Facebook, Twitter, LinkedIn, Google Mail, WordPress, and lots more!

Adblock Plus

Annoyed by adverts? Troubled by tracking? Bothered by banners? Install Adblock Plus now to regain control of the internet and change the way that you view the web.

Ad Hacker

Ad Hacker shows you which advertisers and publishers are following you around the Internet. Developers can see details about Javascripts, beacons, and other web bugs. Write your own rules for finding bugs in XML

Web Developer

The Web Developer extension adds a menu and a toolbar with various web developer tools

WebRank Toolbar

A toolbar that gives Google Pagerank, Alexa, Compete and Quantcast Rank, pages indexed and backlinks in Google, Bing and Yahoo. Bookmark webpages at PickMeWeb.com, view similar websites at SimilarSites.com. Delicious, Digg and Tweet Count.

Cybersearch

What is CyberSearch? It lets you perform various types of Google or Bing searches right from the address bar in Firefox 3. As you’re typing the extension will send your query to the search engine, grab the results, and then display them along side the history results that Firefox normally shows.

SeoQuake SEO extension

Seoquake is a Mozilla Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization(SEO) and internet promotion of web sites. Seoquake allows to obtain and investigate many important SEO parameters of the internet…

CacheViewer

This extenion is GUI Front-end of “about:cache”. Allows searching and sorting memory and disk cache files.

LastPass

I used to use KeePass, but I just like LastPass better. It did a great job of importing (and then removing) my Firefox stored passwords, and its secure password creation tool makes using different passwords on new sites a snap. The web interface is a great way to manage my logins and groups.

BetterPrivacy

Ever wondered why you are still tracked though you tried everything to prevent it?
BetterPrivacy is a safeguard which protects from usually not deletable LSO’s on Google, YouTube, Ebay…

FEBE

As with anything else on your computer, it’s never a bad idea to back up your Firefox install. FEBE will back up everything – extensions, themes, bookmarks – or just what you choose, and you can set up an automated schedule. It’s also got integrated Box.net support, which is actually a fairly nice way to roll-you-rown manual Firefox syncing.

AdBlock Plus.

Annoyed by adverts? Troubled by tracking? Bothered by banners? Install Adblock Plus now to regain control of the internet and change the way that you view the web. You can also choose from over forty filter subscriptions to automatically configure the add-on for purposes ranging from removing online advertising to blocking all known malware domains.

Ghostery

Protect your privacy. See who’s tracking your web browsing and block them with Ghostery.

Screengrab!

Screengrab! is an extension that makes it easy to save a web-page as an image – it’s a screen capture tool for Firefox! With it, you can save anything that you can see in a browser window – from a small selection, to a complete page. You should really download it right now.

AutoProxy

Are you concerned about your privacy? Or, are you blocked from some websites by a firewall? And, are you arming yourself with a proxy? In that case, AutoProxy is designed for you! A tool to help you use your proxy automatically & efficiently.

Feedly

Feedly organizes your favorite sources into a magazine-like start page. Powered by Google Reader and Twitter.

DownThemAll!

DownThemAll lets you download all the links or images contained in a webpage and much more: you can refine your downloads by fully customizable criteria to get only what you really want.
DownThemAll is all you can desire from a download manager: it features an advanced accelerator that increases speed up to 400%, it allows you to pause and resume downloads at any time and, last but not least, it’s fully integrated into your favorite browser!

CookieCuller

Keep the cookies you want, automatically delete the rest

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 browsing.

FireShot

FireShot is a Firefox extension that creates screenshots of web pages (entirely or just visible part).
Unlike other extensions, this plugin provides a set of editing and annotation tools, which let users quickly modify web captures and insert text annotations and graphical annotations. Such functionality will be especially useful for web designers, testers and content reviewers.

FirePHP

FirePHP enables you to log to your Firebug Console using a simple PHP method call.
FirePHP is ideally suited for AJAX development where clean JSON or XML responses are required. All data is sent via a set of X-FirePHP-Data response headers. This means that the debugging data will not interfere with the content on your page.

Xmarks Sync

Xmarks is the #1 bookmarking add-on. It takes only a moment to get up and running with Xmarks. After you install the add-on, click on the notification to set up Xmarks and start backing up and synchronizing your bookmarks. Install Xmarks on each computer you use, and it seamlessly integrates with your web browser and keeps your bookmarks safely backed up and in sync.

Greasemonkey

Allows you to customize the way a webpage displays using small bits of JavaScript. …

Codetch

Get the feel of Dreamweaver in a Firefox extension. Edit your documents right next to your web pages as you surf.

ColorZilla

Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies.
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..

RefControl

You create a list of sites, and the referrer that should be sent for each site. You can choose to send that referrer unconditionally or only for third-party requests. Additionally, you can specify the default behavior for any site not in the list.

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.

IE View

Lets you load pages in IE with a single right-click, or mark certain sites to *always* load in IE.

FaviconizeTab

This extension adds a new “FaviconizeTab” option to the context menu of the tab When it is clicked, The width of the tab becomes small up to the size of favicon. It returns to the former size when “FaviconizeTab” is clicked again.

WOT – Safe Browsing Tool

Would you like to know which websites you can trust? The WOT add-on is a safe surfing tool for your browser. Traffic-light rating symbols show which websites you can trust when you search, shop and surf on the Web.

User Agent Switcher

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of the browser.

ScribeFire Blog Editor

ScribeFire is a full-featured blog editor that integrates with your browser and lets you easily post to your blog. You can drag and drop formatted text from pages you are browsing, take notes, upload images, and post to multiple blogs.

Google Gears

Gears is an open source project that enables more powerful web applications, by adding new features to your web browser:

Zemanta

Zemanta expands the author’s regular blogging or email dashboard, populating it on the fly with content suggestions relevant to the current text. It presents images, links, articles, tags in a simple interface. It encourages re-use and linking to other content with as little effort as possible – a single click.

Zemanta supports Wodpress, Blogger, TypePad, Movable Type, Ning, Drupal, LiveJournal, Tumblr and email platforms Google Mail and Yahoo!Mail.

SeoQuake SEO extension

Seoquake is a Mozilla Firefox SEO extension aimed primarily at helping web masters who deal with search engine optimization (SEO) and internet promotion of web sites. Seoquake allows to obtain and investigate many important SEO parameters of the internet project under study on the fly, save them for future work, compare them with the results, obtained for other, competitive, projects.

Session Manager

Session Manager saves and restores the state of all windows – either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

FireShot

FireShot is a Firefox extension that creates screenshots of web pages (entirely or just visible part).
Unlike other extensions, this plugin provides a set of editing and annotation tools, which let users quickly modify web captures and insert text annotations and graphical annotations. Such functionality will be especially useful for web designers, testers and content reviewers.

Firebug

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.

FireFTP

Along with transferring your files quickly and efficiently, FireFTP also includes more advanced features such as: directory comparison, syncing directories while navigating, SFTP, SSL encryption, search/filtering, integrity checks, remote editing, drag & drop, file hashing, and much more!

Copy Plain Text

Have you ever copied something to Thunderbird or Office and been annoyed that the text formatting (bold, font size, etc) came with it? Don’t you wish you could just copy the text itself, without having to copy it, paste it into notepad, then copy it again? This extension gives you an option to copy text without the formatting. You can even set it to trim extra space in and around the copied text!