Do you remember Jetpack?
It is the Mozilla Labs project that makes the add-on building process easier, mixing elements of HTML, CSS and JavaScript.  Mozilla has released an awesome Jetpack Gallery, which serves as a community for Jetpack developers and add-on users.

Do you like being able to virtually grab a page and scroll up or down it in your browser?  Now, some other programs have this ability (such as most PDF readers out there) however the web browser does not, until now.  The Grab and Drag add-on for Firefox will enable grab and drag scrolling, flick gestures, and momentum scrolling in Firefox.
This comes in really handy for tablet PCs, where your pen is taking the place of your mouse.  You can [...]

Here is a quick tip that is not that well known.  If you want to start private browsing in a hurry, and you don’t have time to dive through the menus to start it (Tools > Start Private Browsing) then just type about:privatebrowsing into your address bar.

There you have it.  Once you have done so, it will ask you if you want to switch into Firefox’s private browsing mode.  You could also save about:privatebrowsing as a bookmark, so you have [...]

Need to quickly navigate back in the browser history?  Now sure, you could click the actual backwards button, in the Firefox navigation toolbar.  I have another alternative for you to try though.  MileWideBack is an add-on for Firefox that will let you click on the left border of your Firefox window to go back to the previous web page you were viewing.
What does does this extension for Firefox allow you to do?  Well, if you can navigate forward if [...]

Need to save a list of links, but don’t want to copy each one, one by one, individually?  Then you might check out Multi Links.  This Firefox add-on will let you open, copy, or bookmark multiple links, rather than having to handle each one individually. 
To get started, all you have to do is right-click and hold to drag a box around the links you want to effect or “take action” on.  When you release the mouse button, you [...]

I think everybody, at times, would like to be able to customize certain web sites to better meet their goals.  Now, I am not talking about simple visual edits – like making the background black and the text white.  How about adding keyboard shortcuts for certain web site links and navigation elements?  You an do that and more with the Customize Your Web add-on for Firefox.
So do you want to customize web sites without writing one single line of code?  [...]

Want to have Firefox just clear out the un-important stuff when you start browsing?  Now, this is highly based in my opinion – and I do have to say that one man’s un-important data might be another man’s stuff he can’t miss. 
I’ll share with you though how I have my browser setup to clear some un-important data each time I close the browser.
Mitch’s Clear History When Firefox Closes Settings
Go to Tools, and then click on Options.
Next, go [...]

Don’t you hate it when you visit a web site and the web site’s text is so small, you can barely make out what you are reading?  Here are a few ways you can work around that everyday issue.
Three Ways to Enlarge or Shrink Text
You can enlarge text per web site you are visiting by holding the Ctrl key on your keyboard and scrolling up to enlarge text, and down to shrink text.  If your mouse doesn’t have the [...]

To get to the Applications menu, you’ll want to go to Tools in the menu toolbar, then Options, then click on the Applications tab.

From here you can change just about any way that Firefox relates to any other file, application or task out there.  Here are a few things I did to speed up my browser usage.
ARCHIVES: For archives (like .zip, .rar, ect) I set the action to “Save File”, that way I can skip Firefox asking me if [...]

Having seen the phase of toolbar upon toolbar come our way in this browsing generation, many have been labeled as evil space wasters that must be done away with.  However, I do have to say not ever toolbar out there is evil.  Now I don’t think you should ever become this crazy, but used in the right way they can be handy. 
Look at these handy toolbars you can add to Firefox:

Forecastfox – Get international weather forecasts from AccuWeather.com, and [...]