Fight Firefox resizing with four simple steps

Hate it when websites take it on themselves to resize your browser window? We do. Here are four simple steps to make sure that these Webdev control freaks never resize your Firefox window again:
OS X and Linux (Windows is similar):

1. Click "Edit, then Preferences
2. Select the Content tab
3. To the right of Enable JavaScript click Advanced
4. Uncheck the box next to Move or Resize Existing Windows
   

Source: TechPwn