Image Resizer/Scaler is an add-on for Firefox that lets you resize any image on the web by dragging at it using the right mouse button.
>> Live demo
- Drag with the right mouse button to resize any image!
- Right click on a resized image to restore it to the defaults, or drag again to continue
- Hold down CTRL and click the middle mouse button to maximize an image.
- Hold down CTRL to disable the right mouse button behavior
Below are some sites that have reviewed Image Resizer/Scaler.