Ui.click hold context menus
From MozillaZine Knowledge Base
On the Macintosh, many users do not use a two-button mouse. In the mid-’90s, Netscape started using the convention of “click-and-hold” to provide access to the context menu. Later, Apple standardized Control-Click as the way to access context menus. For backwards compatibility, Mozilla still supports “click-and-hold.” This preference determines whether or not the context menu will be shown when clicking and holding down the primary mouse button on a Macintosh.
Possible values and their effects
Holding down the primary mouse button will show the context menu.
“Click-and-hold” does nothing; Control-Click is the only way to show the context menu.
Note: On Gecko 1.8.0 (Firefox 1.5 etc) this is hard coded to TRUE on OS X and FALSE on all other platforms. The preference did not exist then and if manually created has no effect.
First checked in
Has an effect in