Mouse Pinch-To-Zoom is a Firefox add-on that enables you to zoom in and out on a website using your mouse wheel. It provides three activation modes and allows customization of zoom speed and smoothness.
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Mouse Pinch-To-Zoom allows you to zoom in and out on a website without making everything huge and unreadable!
It works like a pinch-to-zoom gesture on a touchpad or a touchscreen, but all you need is a mouse wheel.
The extension offers three activation modes:
• Zoom by turning the mouse wheel while holding the Alt key
• Zoom by turning the mouse wheel while holding the left or right mouse button
You can also customize the speed and smoothness. All the settings are easily accessible by clicking on the extension logo.
If you experience any issues, please feel free to email me with a bug report.
Very customizable, however as other users have already pointed out you have to change some entries in about:config if you want it to work with the alt key (otherwise you can use the "right click + scroll" option instead) and you have to enable the "access data for all websites" permission for it to work on all websites right away. Being able to reset the zoom with alt + middle click is a great feature