Since Facebook is the king of the hill when it comes to social networks, there have been a lot of add-ons dedicated to making it better.  Facebook is great, but is not without flaws.  Thankfully, these Firefox add-on developers have worked out some of the kinks and have masterminded some of the best add-ons for Firefox to date. 
Here are my top five Facebook add-ons you can add to Firefox.

So which bookmark add-ons for Firefox are downloaded most often?  Here are the top ten most downloaded bookmark extensions for the browser.

SmarterFox – Browse faster by speeding up common tasks – faster downloading, searching, visiting favorites, copy & paste, and more.
Xmarks (formerly Foxmarks) – Xmarks is the #1 bookmarking add-on. Install it on all your computers to keep your bookmarks and (optionally) passwords backed up and synchronized.
Delicious Bookmarks – Delicious Bookmarks is the official Firefox add-on for [...]

In need of a way to download all the images you may have uploaded to your Facebook photo album?  Sure you could go through each image, click by click and download each one individually.  Why do that though, when you have FacePAD.  This extension will let you grab all the photos from any album you need on Facebook.
Better known as the Facebook Photo Album Downloader, FacePAD will not only let you grab your own photo album, but will also [...]

Foxmarks, one of my favorite Firefox add-on suggestions for bookmark syncing and backup, is changing names today.  Foxmarks is becoming Xmarks.  (Waits for the “X marks the spot jokes)  The new Xmarks service looks to be more geared towards sharing links, ala Stumble Upon and Digg. 
Why make the move?  Well, one would guess that sharing links might be a more profitable business model, more so than bookmark syncing alone.  Via the Xmarks blog, here are some FAQs for [...]

When browsing through your Firefox profile folder, you might see a lot of odd files. Some might make sense, such as your searchplugins folder, however others might seem a little odd.
Here are some of the important files you might seen in your profile folder and what they are used for.

search.sqlite and the searchplugins folder – The first file, search.sqlite stores the order that your search engines (for the search box) are sorted. Inside of the searchplugins folder you [...]

Backing up your bookmarks is one of those chores you have on your to-do list but never get around to it.  Then when they are lost, you say – I wish I would have.  Here are a few Firefox bookmark backup techniques to help you out.
How to Backup Your Bookmarks Manually
From the Firefox menu bar go to Bookmarks >  Organize Bookmarks to bring up your bookmarks manager.  Now you want to click the top button that says Import and Backup.
[...]

It took me a long time to give Foxmarks a second shot.  All I remember from the first time around I used it was I didn’t like it.  Seems as if it bugged me a lot or didn’t want to work.
Having given it a round two now, I am happy to say I have done so.
After the death of Google Browser Sync, I was looking for a new way to keep my bookmarks on my desktop and my bookmarks on [...]

Told you last week about Google’s plans to kill off the semi-popular Google Browser Sync extension.  According to Ars Technica, while they were tossing the dirt in the hole – somebody decided to do this:
Google is distributing the Browser Sync source code under the BSD license and is making it available through a Subversion source control repository on the Google Code website.

Good news for those of us who really liked this add-on.  The reason for its popularity is that [...]

If you haven’t made the jump yet, there are a few files you may want to make sure you back up before going from Firefox 2 to Firefox 3.  The first would be your password files.  These files are located in your profile folder. 
Backup the Firefox files called:

signons.txt
signons2.txt
key3.db

Copy and past them into the place you want to back them up to, and you are done.  To restore them, make sure you don’t have Firefox running and then go [...]

Sure there are tools, downloads and services that may do this for you, but what fun is that?  Just in case you don’t feel the need to download another addition to the browser just yet – here is how you can backup your Firefox saved passwords the manual way.
First, navigate yourself to your profiles folder and then you want to copy three files, they are named:

signons.txt
signons2.txt
key3.db

Copy and past them into the place you want to back them up to, and [...]