How to Use :
There are always compatibility issues with different browsers, we the developers have to test our application in every browser whether it is IE 7 or IE 8 or Mozilla etc…
Microsoft has implemented one good feature in IE 8, introduced developer tools which allows us to test pages in both IE 7 and IE 8.
To access Developer Tools
Open Internet Explorer 8 à Tools à Developer Tools or just use the F12 key of keyboard.
In the developer tools you will see “Browse Mode” and list having IE 7, IE 8 and IE compatibility. You can select the appropriate option and page will load according to the option selected and will be displayed as it is displayed in IE 7 or IE 8.
Compatibility mode of IE8 loads your applications solving design problems like misaligned text, images, or text boxes.
Here is a list of useful Mozilla Firefox Add-ons :
2) Web Developer
The Web Developer extension adds a menu and a toolbar with various web developer tools.
View Internet Explore Tab in Firefox . This is a very nice addon to check compatibility of Internet Explorer in Firefox
YSlow analyzes web pages and why they’re slow based on Yahoo!’s rules for high performance web sites.
HttpFox monitors and analyzes all incoming and outgoing HTTP traffic between the browser and the web servers.