Easy to use extension that works with Firefox, Mozilla and Thunderbird.
Right click on an image and select a zoom option from the popup menu,
or, hold down the right mouse button in combination with the mouse
wheel to zoom in or out on an image.
Features include:
- Zoom In/Out
- Reset Image Size
- Custom Zoom
- Custom Dimensions
- Fit Image to Screen
- Zoom to Preset Values directly from menu
- Option to Change Zoom In/Out Factor
- Options to hide/show each menu item
- Show items in main context or a Zoom Image sub menu
Homepage: http://imagezoom.yellowgorilla.net