Southern writes:  

Does your Firefox take too much time to load? By loading we mean that it takes a lot of time to open when you click the Firefox button. Now the question arises; how to launch Firefox instantly?

Bradblogging.com has shared a very useful tip that enables you to launch Firefox completely with in 3-5 seconds, instead of 15-20 seconds in our case.

Simple hover to this page, where you will find a .exe file.

Download that file.
Install it on your computer.
Enjoy!

Basically, it is a Firefox Preloader that is designed to load parts of Mozilla Firefox into memory before it is used to improve the its start up time.

Note: Do note that it will work more efficiently on systems with a bigger RAM.

skidzopedia

Southern writes:  

Author: Koroush Ghazi
Last Modified: September 2011

Introduction

Mozilla Firefox, or simply Firefox for short, is just a free Internet browser. It's not a cure for cancer. It doesn't wash your car or make you a frothy coffee. Why all the fuss and hype over Firefox? In a nutshell, the reason is simple: Firefox is a true open source competitor to Microsoft's Internet Explorer; a dynamic and evolving browser which is constantly gaining new features that make browsing the Internet easier, safer and more enjoyable. Most importantly, Firefox is the most customizable browser available today.

more: tweakguides

Southern writes:  

HTTPS Everywhere 1.0 has been released, and the project is out of beta. Version 1.0 includes support for over 1,000 new sites, a better UI, and performance improvements.

HTTPS Everywhere is a Firefox extension produced as a collaboration between The Tor Project and the Electronic Frontier Foundation. It encrypts your communications with a number of major websites. Many sites on the web offer some limited support for encryption over HTTPS, but make it difficult to use. For instance, they may default to unencrypted HTTP, or fill encrypted pages with links that go back to the unencrypted site. The HTTPS Everywhere extension fixes these problems by rewriting all requests to these sites to HTTPS. Firefox users can get it by clicking here:

more: EFF

Southern writes:  

Here is a list of Firefox keyboard and mouse shortcuts for each of the three major operating systems organized by topic. mouserunner

Southern writes:  

Change the text in the titlebar to be just what you want.

Any custom text is OK plus you can add the current tab's URL, page title, Firefox version or build number, Gecko version or build number.

Customize Titlebar

Southern writes:  

A Firefox extension that demonstrates HTTP session hijacking attacks.

System Requirements
* Mac OS X: 10.5 or newer on an Intel processor.
* Windows: XP or newer. Install Winpcap first!
* Linux: Not currently supported.
* Firefox: 3.6.12 or newer. 32-bit only. Firefox 4.x beta not supported.

Firesheep

story: 'Firesheep' developer: Facebook is ignoring huge security problem