Firefox is the most popular and useful browser specially among website designers and developers. It has thousands of add-ons which makes it more popular and user friendly. Today we i have compiled 25+ best useful and i think essential firefox add-ons.
1- Fastest Fox
Save time by speeding up repetitive tasks. Get faster, parallelized downloads, see definitions, auto-load the next page, improve searching, and more. FastestFox will dramatically enhance your productivity.
2- Tab Scope
Preview and navigate tab contents through popup.
3- Time Tracker
Do you spend too much time on Firefox? Keep track of how much you browse with Time Tracker.
4- Easy YouTube Video Downloader
Easiest Youtube video downloader ever, single click non-intrusive direct download buttons for FLV, 3GP, MP3, MP4, 720p HD and 1080p Full-HD qualities.
5- Flash Block
Blocks all flash content and leaves placeholders on the webpage that allow you to click to download and then view the Flash content.
6- Browser Backgrounds
Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.
7- Web Developer Toolbar
The Web Developer extension adds various web developer tools to a browser.
8- HP Smart Web Printing
With a simple plug-in for your browser, quickly Select & Clip or Select & Print web pages just the way you want them, and eliminate all that wasted ink and paper.
9- PDF Download
Use PDF Download to do whatever you like with PDF files on the Web. Regain control and eliminate browser problems, view PDFs directly in Firefox as HTML, and use the all-new Web-to-PDF toolbar to save and share Web pages as high-quality PDF files.
10- Fire FTP
FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.
11- Echofon for Twitter
Echofon (formerly TwitterFox) notifies you of your friends’ tweets on Twitter. Syncs with iPhone.
12- Tab Mix Plus
Tab Mix Plus enhances Firefox’s tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
13- InForm Enter
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.
14- Read It Later
Save pages to read later with just one click. When you have time, access your reading list from any computer or phone, even without an internet connection!
15- Thumbnail Zoom
Zooms thumbnail pictures from Twitter, MySpace, Amazon, Picasa, LinkedIn, Hi5, Twitpic, deviantART, PhotoBucket, Tagged, Last.fm, Wikipedia, YouTube, DailyMile etc.
16- Firefox Showcase
Easily find and manage your browser tabs.
17- IE View
Lets you load pages in IE with a single right-click, or mark certain sites to always load in IE.
18- Text size toolbar
Text size toolbar adds buttons to increase or decrease text size or restore default size easily.
19- Cyber Search
Adds advanced Google Search capabilities to the Firefox 3 address bar. Supercharge the “Awesome Bar” with instant search results that appear as you type!
20- 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.
21- Measure It
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
22- Browser Window Resizer
Resize your browser to various standard resolution sizes.
23- Font Finder
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
24- Image Zoom
Adds zoom and rotation functionality for images.
With gTranslate you can translate any text in a webpage just by selecting and right-clicking over it. The extension uses the Google translation services to translate the text.
26- Delicious Bookmarks
Delicious Bookmarks is the official Firefox add-on for Delicious, the world’s leading social bookmarking service. It integrates your bookmarks and tags with Firefox and keeps them in sync for easy, convenient access.
27- Total Validator
Perform multiple validations and take screen shots in one go. This 4-in-1 validator works with external, internal, or local web pages using a local copy of the desktop tool