Webmaster Tools

Firefox

1. Web Developer - Adds a menu and a toolbar with various web developer tools.
2. Adblock Plus: Element Hiding Helper - Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.
3. 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.
4. MeasureIt - Draw out a ruler to get the pixel width and height of any elements on a webpage
5. ColorZilla - Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies
6. Flagfox - Displays a country flag depicting the location of the current website’s server and provides quick access to detailed location and webserver information.
7. FireFTP - FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.
8. ImTranslator - ImTranslator includes Online Translator in 1640 language combinations
   View Source Chart - View Source In Color-Coded Chart
9. Aardvark - Powerful and user-friendly selector utility for selecting elements and doing various actions on them. It can be used for cleaning up a page prior to printing it (by removing and isolating elements), and for web development
10. Abduction! - Capture an entire web page or part of a web page and save it as an image.
11. Image Zoom - Adds zoom functionality for images
12. Form Saver - Saves form field data as autofill-bookmarklets. Works with inputs, checkboxes, radio groups, textareas, and selects.
13. Nuke Anything Enhanced - Allows hiding of almost anything via context menu ‘Remove Object’.
14. Screengrab - Screengrab! saves webpages as images… It will capture what you can see in the window, the entire page, just a selection, a particular frame… basically it saves webpages as images - either to a file, or to the clipboard.
15. Picnik - My favorite image editor - Add a menu options and a toolbar icon to make importing images into Picnik easier.
16. ShowIP - Show the IP address(es) of the current page in the status bar. It also allows querying custom information services by IP (right mouse button) and hostname (left mouse button), like whois, netcraft.
17. Capture FOX - You can capture your screen and record your voice to make screencasts (tutorials, e-lessons, etc.).
18. LinkChecker - Checks the validity of links in a webpage.
19. 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.
20. PageDiff - Pagediff is a simple page compare application. It helps web developers and designers to see HTML-code(text) differences between web pages
21. Show the Image - Shows the largest image in the page. A very simple extension that can be used to show the largest image on the page - what you want to look at - without all the banners and layout around it.
22. Stylish - Restyle the web with Stylish, a user styles manager - Nice one to experiment with, for a web designer.
23. Small Screen Renderer - Turn your Firefox into a cellphone browser. It adds a new menu entry “Small Screen Rendering” under the View menu. Just select it to have the page you are currently browsing redisplayed in a cellphone.
24. Ghostery - A fantastic tool for webmasters - Ghostery Watches the Web Sites that are Watching You. Find out how web sites are watching you across every page on the web with Ghostery. Ghostery alerts you when you visit a web site that has web bugs on it. Web bugs are hidden scripts that track your behavior and are used by the sites you visit to understand their own audience.
25. Finetuna - Send a web based image or a webpage screenshot to finetuna.com for review.
26. TestGen4web - Just like your VCR - for Firefox. It records what you do, stores it, and plays it back on demand.
27. Web Analytics Solution - The Web Analytics Solution Profiler (WASP) is a specialized extension aimed at analytics and online marketing professionals who want to do quality assurance and understand how their tags (web bugs) are implemented. Also includes a powerful crawler.
28. Palette Grabber - Creates a color palette for Photoshop, Paint Shop Pro, GIMP, Flash, Fireworks, Paint.NET, or OS X based on the current page.
29. Window Resizer - Resize your browser to various standard resolution sizes
30. Save Complete - This extension fixes this, and saves the complete page, including all images, stylesheets, flash, javascript, and anything else associated with the document, even imported stylesheets and images referenced in the stylesheet files.
31. Wappalyzer - Wappalyzer tracks the distrubition of software on the web and shows you which CMS, wiki, message board etc. is used on the page you’re currently at.
32. Tiny.pl - URL Shortener