Almost all web developers know about Firebug, a plugin for Firefox that makes web development so much easier, at least for developing in Firefox. Not everyone knows that Safari has its own development tools built right in.
Available on both the Windows and Mac versions of Safari (preferences > advanced) is a tick box ‘Show Develop menu in menu bar’ which enables the development tools. Â By default it is unticked but enabling it allows you to right-click on any element on a web page and select Inspect Element and bring up the Web Inspector much like you can do with the Firebug plugin for Firefox.
Above: the Web Inspector.
The Mac version Â gives you this menu which as you can see allows you to perform some very handy tasks such as opening the page in another browser and spoofing the browser’s user agent.