From MozillaZine Knowledge Base
Gecko 1.9 implements full-page zooming. Mozilla Firefox exposes this functionality in the user interface through the “View → Zoom” menu and allows zooming by holding down “Ctrl” and pressing + or - or by scrolling the mousewheel up and down. The zoom levels that the user can change to are limited to the ones specified in this preference.
This preference was previously named toolkit.zoomManager.fullZoomValues.
Possible values and their effects
A list of comma-separated numbers, representing the zoom levels as multipliers that the user can use on content. Default value is .3,.5,.67,.8,.9,1,1.1,1.2,1.33,1.5,1.7,2,2.4,3 (zoom levels of 30%, 50%, 67%, 80%, 90%, 100%, 110%, 120%, 133%, 150%, 170%, 200%, 240%, and 300%).
First checked in
2008-02-13 by Reed Loden (patch by Elmar Ludwig)
Has an effect in