Do you use multiple computers and want to sync your saved passwords between them all? LastPass is an extension for Firefox that will allow you to do that easily within the browser.  LastPass hides all your individual passwords behind one master password.  When you type in that master password, then LastPass automatically logs you in to any web site you have set it up to remember. 

If you do a lot of work online, being able to take notes as you work is definitely a good thing.  Rather than scribbling on random sheets of paper or bouncing between Firefox and a notepad-like program, keep it all in Firefox with QuickFox Notes. This multi-tab note taking extension is awesome.
Some of the features include:

Simple & Multi tab
Auto save notes
Check spelling
Changeable font size
Changeable background color
Easy search tool
Various keyboard shortcuts

Another nice feature is that it saves your notes in the [...]

Want to be able to comment on any web site out there on the Web, without the permission of the web site in question?  Reframe It opens up a new portal of communication, by allowing you to communicate through specific comments next to the web site you are referencing. 
Why just send a simple text-based note, when you can send that and the web site you are talking about all in one swift, easy to access movement?  Here is the [...]

Want to store notes you have taken across the Web in your bookmarks? 

Net Notes will allow you to easily store notes on specific sites in your bookmarks.  Once you install Net Notes, you can start taking notes about the active tab you have open.  The Net Notes sidebar can be toggled (shown and hidden) via Firefox view menu, with a toolbar button, or with a customizable keyboard shortcut.  The notes themselves are edited in a simple textbox in [...]

More of a pain than a savior, the toolbar the toolbar tip floating boxes of help and information in Firefox tend to hurt me more than help me.  Yes, I know the reload button allows me to reload the current page, I got it!
If you want to disable this feature, follow these steps:
Step 1: In your address bar, type in about:config
Step 2: If given a warning, tell Firefox you promise to be nice.  Now type this into your Filter search [...]

Need to jot something down real quick before you forget, and don’t want to be bothered launching another web site or program to do it?  The Really Simple Notepad bookmarklet is just what the forgetful web user needs.
Just drag and drop this link to your bookmarks toolbar:
Really Simple Notepad
Now when you need it, hit the bookmarklet link and up will come a popup window where you can type. The fun doesn’t stop there though. If you want to save [...]

Like the idea of the Google Notebook add-on but you don’t want to be bothered with installing yet another extension?  Google has released a useful bookmarklet for people using browsers who can’t take advantage of the browser extension.
The secret here is that this bookmarklet also works for handy dandy Firefox.
All you have to do is visit the Google Notebook Bookmarklet web site, and drag the “Note This” to your bookmark toolbar.  Your done!  Now clicking that link will bring up [...]

It seems like I am always doing research on one thing or another, for a future article or a future project of mine.  There are not that many tools out there to help you collect your information and save it for later.  The ScrapBook extension for Firefox is one of the few.  It is simple and also allows to save web pages and organize them as you see fit.
Here are some of the features ScrapBook provides…

Save Web page
Save snippet [...]

The Mozilla Store has been getting better and bigger ever since it’s launch. They have tons of cool Firefox or Mozilla themed merchandise for you to pick up. To help you with your shopping I though I would point out a few of my favorites that they have in stock right now.
#1 – Firefox Plushie – How is this not the cutest thing ever? You can get your own plush red panda (also known as firefoxes) then hug [...]

Maybe I just have not been paying attention, but this is the first time I have ever heard of Google Notebook. I saw it as a widget on Google’s personalized homepage. It looked pretty neat, so I checked it out and found out they have a Firefox extension for it as well.
+ Learn More About the Google Notebook Extension!