Implements smooth pinch-to-zoom and double-tap (for OS X only). Recognizes Gecko gesture events and responds accordingly. Similar behavior to that seen on mobile browsers.
The add-on includes two settings. The first is the sensitivity--this is fairly simple to understand. High sensitivity means the pinch-zooming responds a lot to small movements, low sensitivity means less response to small movements.
The second setting is Fast / Pretty mode. In Fast mode, complex web pages will scale as quickly as simple ones, but animations will jump when the gesture ends, and there is a small amount of latency before the zoom begins. In Pretty mode, complex web pages are difficult to zoom with, but simple ones perform well. Animations will continue to run normally. Fast / Pretty mode does not affect images or videos opened directly, only full web pages.