Window Resizer
Window Resizer is a Firefox Extension.
You can download it from the developer’s website or the Firefox Add-Ons site.
This extension allows you to resize your Firefox window to various standard resolution sizes.
Just right-click on any webpage and choose “Resize Window” from the context menu:
A message box will appear where you can choose your resolution:
Your browser will then instantly resize to the chosen resolution.
As of Version 1.0 there are no further customizations that can be made.
