Originally for debugging purposes, this preference now determines whether or not Caret Browsing mode is active. Caret Browsing is provided as a way to navigate through a web page—using only the keyboard—by moving a text caret. This mode is more easily toggled by pressing [F7].
Caret Browsing mode changes the effects of the arrow keys, as well as the [Home] and [End] keys.
Possible values and their effects
A blinking cursor (the caret) is visible on all displayed webpages, allowing the user to navigate through the page as they might a word processor document.
The system caret is hidden. (Default)
Tools → Options → Advanced → General / Accessibility → "Always use the cursor keys to navigate within pages" (Firefox 2 and above)
Tools → Options → Advanced → General / Accessibility → "Allow text to be selected with the keyboard" (Firefox 1.5)
First checked in
Has an effect in
- Netscape (all versions since 6.1)
- Mozilla Suite (all versions since 0.9)
- Mozilla Phoenix (all versions)
- Mozilla Firebird (all versions)
- Mozilla Firefox (all versions)
- SeaMonkey (all versions)