Hello. I enhanced my template visually yesterday. So I thought of writing a post on How To Change A Theme Of Firefox, so that it looks kewl

Yea, you may know how to install a theme in Firefox but I didn’t knew this thing a year back So if you find it difficult to install or change a theme in Firefox then you can surely follow this tutorial.

This tutorial will also tell you how to uninstall a theme correctly.

You need to have Firefox installed on your system. Get it from here:
Firefox Download

Once installed follow these simple steps to Install A Firefox Theme:

01. Fireup your Firefox and go to below link to choose your theme from a wide variety available:
https://addons.mozilla.org/en-US/firefox/

02. Click on the theme preview and you will be brought to a page like below:

Click on Add to Firefox

03. You will now be brought to a page like below, and click on Accept and Install:

This will bring a prompt for you, confirming your action. Click On Install Now

Now the downloading and installation of theme will start automatically:

04. After the download and installation gets successfully completed, a small pop up will show you. Click on Restart Firefox:

If you have opened more than one tabs or windows in your Firefox then one more prompt will come up, giving you option to reopen all the tabs when Firefox restarts. Click on Restart to complete installation:

Woo installation done Upon restart you will see a new look of Firefox:

01. Click on Tools –> Add-ons

02. Now click on Themes tab and choose Default theme and click on Use Theme

A small pop up will come up. Click on Restart Firefox:

If you have opened more than one tabs or windows in your Firefox then one more prompt will come up, giving you option to reopen all the tabs when Firefox restarts. Click on Restart to revert the theme to default one:

All done successfully You have successfully reverted your theme back to original one.

On personal note, I would suggest you change your theme only if you have over 512MB of Ram, because that would not make your Firefox slow

Check out these 20 Popular Themes from Firefox
20 Popular Themes

You may also want to go through this popular tutorial:
Increase Firefox speed by 10-30x