So there have been many, many browsers over the years, but for those people unsure, I will start with what a browser actually is. This is not as stupid as you might think - have a look at this video.
But a lot has changed since then - even though that was not very long ago. As they don't actually explain in the video, a browser is a program installed on your computer that allows you to view the web - it is not a search engine, it is not a website, it is a program. There are several main browsers out there, some that come with your computer and some that don't (all versions newest) :
Microsoft Internet Explorer 9
Mozilla Firefox 6
Google Chrome 16
Numerous mobile browsers
Internet Explorer is the default that comes with Windows, and Safari comes with Macs. Here is a graph of world usage of browsers in August 2011 (pretty recent then):
There have been many arguments over the years as to which browser is the best, and my verdict is Google Chrome. This is simply because it is a lighter program - meaning that it takes up less CPU (processing power) on your computer, meaning it can launch faster and use less battery power on a laptop. It also has sync, which allows you to synchronize all your bookmarks, themes, extensions and even auto-fill and password data. This is all encrypted before being stored on the "cloud" so that no-one except you can reach it.
There are also other reasons why some browsers are better than others. This is usually because of the way that they display web pages. Internet Explorer uses its own "render engine" to take something that looks like this:
<div id="example"><i><b>Hello</b> world!</i> Having a great <strong>day</strong>?</div>
And makes it look like this:
Hello world! Having a great day?
Different "render engines" make pages look different if they use some code that has not been covered by that "render engine". There is a handy tool called BrowserLab, that allows you to see what your website will look like on different browsers without having to have them all installed on your computer. For instance, here is my URL shortener, DropURL as viewed in Internet Explorer 6 vs Chrome 13:
And I haven't even touched on Mobile Browsers, which in themselves deserve a whole other post, but I can't be bothered to do that, so here is a mini version:
I think I have sufficiently covered this topic. If you feel not, feel free to comment below.
Alex, signing off.