Here are the most popular add-on collections for the Firefox browser:

Windows 7 Theme for Firefox 3.5

32430 subscribers – This collection of add-ons were gathered to help you make Firefox 3 more seamless in the Windows 7 operating system.  Not only do you get the nice theme and tweaking add-ons, but you also get some great time conserving tools too!

Web Developer’s Toolbox

7934 subscribers – Speed up the development process by using add-ons to troubleshoot, edit, and debug web projects without ever clicking away from Firefox.

Reference Desk

5033 subscribers – Make the librarian jealous with add-ons that help students, researchers or anyone with a tough question find and document all the answers.

Lifehacker’s Must-Have Extensions

3849 subscribers – Then of the must-have add-ons for Firefox, as picked by the brilliant minds over at Lifehacker.com. Included are ten of the best add-ons for Firefox out there today.

Better Pack

2564 subscribers – Lifehacker’s “Better” add-ons, compiling multiple Greasemonkey tweaks for YouTube, Reader, Gmail, Google Calendar, Flickr, and other sites.

Power User Pack

1537 subscribers – Collection of Add-ons for power user, sys admin, developer, surfer, and more.  Most powerful add-ons which would change interface to better and tidy, add some cool functionality.

Traveler’s Pack

1270 subscribers – When the travel bug bites, these add-ons make it easy to plan, book and document your trip — without getting lost along the way.

Family Organizer

1211 subscribers – Create a safe and fun online experience while planning everything the family does offline with add-ons that keep the family cooking.

Social Circuit

1176 subscribers – Whether it’s LOLing with a BFF, finding a job or staying connected with old classmates, social networking add-ons keep the most popular sites front and center.

Icon-Only Perma-Tabs for Gmail and Google Reader

592 subscribers – Keep your Gmail and Google Reader tabs open at all times, but shrink them down to show the favicon only and add your unread count on the icon.

Know of an add-on collection that can get the proverbial job done better than the ones I listed above?  Leave a comment and share it with the group.  Also, if you have pulled together your own unique collection – share those with me too in the comments.

All in all, 2009 was a great year for Firefox.  It grew by leaps and bounds, and continues to be the best alternative browser out there.  Firefox Facts did pretty well in it’s own right too – surpassing the 7,000+ RSS subscriber mark.  So with today being the last day of 2009, let us all sit back and revisit some of the best posts of the year.

Here are 10 of the most read stories, tips, tutorials and reviews I have posted here in 2009.  Hope you check out some classics you might have missed, or revisit a favorite post or two.

#10 – Love (or Disable) the New Tab Button in Firefox

Love it, or hate it – Firefox got one more addition to it’s browser that seems to have gotten a mixed reaction from the fans. The open new tab button rests at the end of your tab bar in Firefox 3.5 giving you an easier user interface to open a new tab.

• More Tab Fun – Move the Close Tab in Firefox

#9 – 10 Popular Web Designer Tools for Firefox

Thanks to Firefox and some of the great add-ons that have been developed for it, your browser is your best friend when it comes to web site design.  From CSS tools, to promoting your domain, here are 10 of the most popular web designer tools for Firefox.

• Top 10 Greatness – Top 10 Personas Backgrounds for Firefox

#8 – Add Another Bookmarks Toolbar to Firefox

Have more than a few bookmarks you want to keep handy on the bookmarks toolbar in Firefox but don’t have the room?  Multirow Bookmarks Toolbar, an extension for Firefox, will help you solve that issue by letting you add as many bookmark toolbars as you need.

• Popular Add-ons – Most Downloaded Bookmark Add-ons

#7 – Firefox Private Browsing Mode Help and FAQ

Want to increase your privacy on your PC?  With the release of Firefox 3.5, our favorite browser now has a Private Browsing mode.  Usually your browser remembers the web sites you have visited, your user names and passwords, your browsing history and more.  However, with this newest addition to the Firefox 3.5 feature list, you can now go incognito on the Internet.

• Firefox Tip – Easier Access to Private Browsing Mode

#6 – Convert YouTube Videos to MP3

The experimental add-on YouTube 2 MP3 will convert and download YouTube videos in the .mp3 audio format.  There is no doubt that YouTube has a large collection of music videos, so this type of service was bound to happen eventually.

• More YouTube Tips – 1-Click YouTube Video Downloader

#5 – Speed up Flash Videos in Firefox

Want to speed up your flash video watching?  By default, Firefox takes a sort of “snapshot” of whatever you are doing every ten seconds.  Why?  It is so that the browser can restore itself, just in case of a crash.  Now you might ask, what does this have to do with flash videos?  Well, the snapshot action is what is causing your ten second delay, at times, with watching flash videos on the Web.

• Firefox Hacks – More Fun Tips with About:Config

#4 – 10 Popular Themes That Are Firefox 3.5 Ready

One of the negative side effects of a new version of Firefox rolling out is the fact that some Firefox theme creators neglect to update their themes to the newest versions.  So, when updating our browser, that leaves some of us in the dark, when it comes to using the themes we know and love.  However, this time around many more popular themes have been updated to support Firefox 3.5 and here are my favorite ten for you to choose from.

• Skins Galore – All the Great Firefox Themes I’ve Reviewed

#3 – Skip to the Download on Rapidshare, Megaupload and More!

Want to skip the totally unnecessary “wait to download” pages on Rapidshare, Megaupload and more?  SkipScreen, and add-on for Firefox is here to help.

#2- All About Perspective – Firefox Wallpaper

Firefox wallpaper that I would actually see myself using is hard to find.  The main reason behind third is that I don’t really like text on my desktop, and I really don’t like feeling like a marketing campaign either.  So with that said, what type of Firefox wallpaper does make me happy?

• Desktop Decorations – Five Star Firefox Wallpaper

#1 – Beginner’s Guide to Greasemonkey

In a nutshell, Greasemonkey is an add-on for Firefox that allows you to customize a web site’s look and function.  Now you don’t have to be a coder to use it though, because there are already hundreds of scripts out there available for free that you can use to help you do a number of different things.

• Another Great Guide: Beginner’s Manual to Stylish

I hope you have enjoyed reading all the Firefox Facts tips, tricks and more this year – and you’ll subscribe to the RSS feed, visit daily and be entertained and informed all the way though 2010 and beyond.  This site wouldn’t be a success without you, so thank you for making Firefox Facts on of the most popular Firefox tip related blogs out there today. Happy New Year!

BONUS – Check out the Best of Mitchelaneous (2009 Edition)

Here is a little more about the extension from the developer:

Palette Grabber is a Firefox extension for web designers. It adds an “Export color palette” command to your Tools menu; selecting this command will extract a color palette for the current page and export it to a Photoshop/Illustrator color palette file. It’s useful for creating mockups of new designs which share a color palette with an existing design.

The Palette Grabber extension supports Photoshop, Flash, PaintShop Pro, GIMP, Adobe Fireworks, and Mac OS X Color Picker palette formats.  You can pick it up from the official web site at http://www.gusprevas.info/palettegrabber/.

Here is what I had to say about them a few weeks back on the Lunarpages Lunartics Web site:

Don’t you hate it when your looking how to do that one little thing on your Web site, but just can not figure out how to get it done? I’ve got a neat resource that will help you keep track of some of the best resources out there and keep all of your favorites at your fingertips. The Web site tlbox.com has a slew of good programing and design tools to help you out.

Yet another great tool for anybody to have in their web development tool belt.

+ Download and Install the tlbox Extension for Firefox!