Most common browsers have some built-in development tools. These tools will help you to reveal HTML of the page and understand how the page is structured. This all sounds good, but they all have their own look and feel. We will see how we can launch the `Developer Tools`.
Internet Explorer
In Internet Explorer we can access `Developer Tools` by pressing `F12`.
Firefox
Firfox has some built-in developer tools, but Firebug seems to be more popular and powerful. We can download the Firebug add-on from http://getfirebug.com/ .
The shortcut to open `Firebug` is `F12`.

FireBug toolbar
Click on the `Inspect` button on Firebug’s toolbar. Move around the page and everything beneath your mouse will be instantly revealed within Firebug, showing you the HTML and CSS behind it.
Chrome
Chrome comes with `Developer Tools`. The shortcut to open `Developer Tools` is `CTRL` + `SHIFT` + `I` or `F12`.

Chrome toolbar
Click on the `Inspect` button on Chrome Developer Tools toolbar. Move around the page and everything beneath your mouse will be instantly revealed within Chrome Developer Tools, showing you the HTML and CSS behind it.
Opera
Opera comes with `Opera Dragonfly`. The shortcut to open `Opera Dragonfly` is `CTRL` + `SHIFT` + `I`.
Safari
Safari has a built-in `Developer Tools`. First, you need to enable that you want to see the Develop menu.
Click on `Preferences…` in the `settings` drop down menu. Go to the `Advanced` tab and check `Show Develop menu in menu bar`.
The shortcut to open `Developer Tools` is `CTRL` + `ALT` + `I`.