Stop browser resizing in Firefox and Opera

One of the worst thing a web developer can do is to resize, or even worse move a users browser window. Luckily there is a simple way of preventing this in both Firefox and Opera.

Firefox
In the tool bar press Tools, then click Options. Go to the Content tab and at the side of the "Enable JavaScript" check box press the Advanced button.

I prefer to uncheck all the boxes, but you do what you want to.

Opera
In the tool bar press Tools, then click Preferences or press CTRL + F12. Select the Advanced tab. In the section to the left, choose Content then then press the JavaScript options button.