There are times when you might want to emulate and browse WML/WAP enabled mobile sites from a desktop PC browser:
1) As a webmaster when you’d want to test how the mobile version of your website looks on a mobile xHTML browser without wasting money on GPRS data charges.
2) If you have a slow/limited internet connection on the PC and would like to speed up by loading webpages faster and save on bandwidth charges.
Wmlbrowser is a free addon for Mozilla Firefox 1.0/2.0 that allows you to browse WAP/WML mobile sites from your desktop computer. Once it is installed, you can choose to customize the toolbar and add the WML Mode button. Now whenever you want to visit a WAP/WML mobile website, simply toggle the button on the toolbar.
While Opera has native support for WML, I prefer this add-on for Firefox since some websites (like the mobile version of Tech[dot]Blog) do not have a dedicated subdomain/subdirectory to access the mobile version of the site(e.g. wap.yahoo.com); they render the mobile site based on browser referrer/agent string. To force the host to display the mobile version of their website, you will need to use wmlbrowser.