What are the best FireFox extensions?

Quest details: What are your favorite FireFox extensions or Greasemonkey scripts and what do they do?
Items posted to quest Syndicate content
  1. Save any page. If any of you have a Mac loved the IE Mac feature of scrapbooking this extension makes it do just that. This module is even better allowing higlighting and editing of saved pages.
    By amanuel, 2 years 4 weeks ago
  2. BookmarkDD is a very useful extension that helps you manage your bookmarks. It notices you when duplicate bookmark is added, specify where is the previous URL and give you the choice to change the parent folder of duplicate bookmark. There is also a window to manage all duplicate bookmarks already in your bookmarks.
    By techblog, 2 years 9 weeks ago
  3. "

    del.icio.us is a social bookmarks manager. It allows you to easily add sites you like to your personal collection of links, to categorize those sites with keywords, and to share your collection not only between your own browsers and machines, but also with others.

    This extension integrates del.icio.us with Firefox and Thunderbird."
    By lwallenstein, 2 years 10 weeks ago
    • Prefetch Links
      Dynamic speed increases can be obtained with Fasterfox's unique prefetching mechanism, which recycles idle bandwidth by silently loading and caching all of the links on the page you are browsing.
       
    • Tweak Network
      Fasterfox allows you to tweak many network and rendering settings such as simultaneous connections, pipelining, cache, DNS cache, and initial paint delay.
       
    • Page Load Timer
      A millisecond accurate page load timer tests the effectiveness of your settings.
       
    • Block Popups
      A popup blocker for popups initiated by Flash plug-ins is also included.
    By _Kill_Switch_, 2 years 10 weeks ago
  4. Great extension that lets you manage all your other extensions as well as many other features of the browser.
    By BlueCockatoo, 2 years 10 weeks ago
  5. "Greasemonkey is a Firefox extension which lets you to add bits of DHTML ("user scripts") to any web page to change its behavior. In much the same way that user CSS lets you take control of a web page's style, user scripts let you easily control any aspect of a web page's design or interaction."
    By lwallenstein, 2 years 10 weeks ago
  6. Persistent sticky notes for Mozilla Firefox
    By techblog, 2 years 9 weeks ago
  7. ReminderFox is an extension for Firefox and Thunderbird that displays and manages lists of date-based reminders and ToDo's. ReminderFox does not seek to be a full-fledged calendar system. In fact, the target audience is anybody that simply wants to remember important dates (birthdays, anniversaries, etc) without having to run a fat calendar application.
    By techblog, 2 years 9 weeks ago
  8. Completely essential plugin that keeps track of your browsing session. Lets you close the browser and keeps track of all your tabs so when you reopen it you're back where you were. Can't live without this one.
    By BlueCockatoo, 2 years 10 weeks ago
  9. " 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.
    The details of the errors are seen when looking the HTML source of the page.

    The extension is based on Tidy. Tidy, was originally developed by the Web Consortium W3C. And now extended and improved by a lot of persons. Tidy is embedded inside Mozilla/Firefox and makes the validation locally on your machine, without sending  HTML to a third party server."
    By lwallenstein, 2 years 10 weeks ago
  10. Easy management of your Google notebook (http://www.google.com/notebook/) through firefox.
    By lwallenstein, 2 years 10 weeks ago
  11. Full Google search toolbar which gives you highlight, search, pagerank and other options not available in Firefox's default google search.
    By lwallenstein, 2 years 10 weeks ago
  12. A must-have extension for web designers. It's a little color picker that exists in the bottom of your browser. Simple, yet effective. Couldn't do without it.
    By monkeypup, 2 years 4 weeks ago
  13. Really nice GMail management extension that lets you monitor more than one GMail account at a time.
    By BlueCockatoo, 2 years 10 weeks ago
  14. RefControl is an extension for Firefox that lets you control what gets sent as the HTTP Referer on a per-site basis

     

    By din, 2 years 4 weeks ago
  15. StumbleUpon tool bar links to the StumbleUpon database. "StumbleUpon helps you discover great websites.
    With a single click you can find and share cool sites matched to your interests."
    By lwallenstein, 2 years 10 weeks ago
  16. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface. An essential.
    By amanuel, 2 years 4 weeks ago
  17. Performancing for Firefox is a full featured blog editor that sits right in your Firefox browse and lets you post to your blog easily. You can drag and drop formatted text from the page you happen to be browsing, and take notes as well as post to your blog.
    By techblog, 2 years 9 weeks ago
  18. FireBug lets you explore the far corners of the DOM by keyboard or mouse. All of the tools you need to poke, prod, and monitor your JavaScript, CSS, HTML and Ajax are brought together into one seamless experience, including a debugger, an error console, command line, and a variety of fun inspectors.
    By lwallenstein, 2 years 4 weeks ago
  19. SessionSaver restores your browser -exactly- as you left it, every startup, every time. Not even a crash will phase it. Windows, tabs, even things you were typing -- they're all saved. Use the menu to add + remove sessions; right, shift, or middle-clicking will delete. "Simple mode" for peace of mind, or "Expert mode" for advanced flexibility. Just Click. Install. Rad.
    By techblog, 2 years 9 weeks ago
  20. Must have for any web dev.
    By lwallenstein, 2 years 10 weeks ago
  21. Oh, what would I do without this? Warns you whenever you click on a PDF link, and allows you to skip it, download it, or view it as html. Such a small thing, but so useful.
    By monkeypup, 2 years 4 weeks ago
  22. FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.
    By techblog, 2 years 9 weeks ago


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I don't have the links handy

whoknows's picture

I don't have the links handy but here are the ones I can remember off the top of my head that I use:

 

Web Developer - a million useful things all in one sexy sidebar

Gmail Notifier - tells me when i have email. rarely.

Del.icio.us - lets me tag things and make messy categories.

HTML Validator - shows me the errors/validations of each website i'm viewing.

View Source Chart - makes crazy chart things in the source. sexy.

Finding links for extensions

BlueCockatoo's picture

If you download that All-in-one sidebar and install it, you can view all your extensions and the links to the pages where you downloaded them from.  It even polls and lets you know when there are new versions out there for all of them.  It is such a cool extension...