From MozillaZine Knowledge Base
Find As You Type (or Type Ahead Find as it was originally called) allows you to start finding text on the page immediately by simply typing the text you’re trying to find. This preference lets you restrict the text being searched to link text only.
Possible values and their effects
Searching through a page with Find As You Type will be restricted to text inside links. (Equivalent to starting your search with a ' [single quote] with this preference set as false.)
Searching through a page with Find As You Type will include all text on the page. (Default)
Radio buttons labeled “Any text in the page” and “Links only” are located under “Edit → Preferences → Advanced → Keyboard Navigation → Find As You Type” and toggle between false and true, respectively.
First checked in
2002-08-19 by Aaron Leventhal (checked in as a default feature rather than packaged as an extension)
Has an effect in