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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

2001-02-14 by Aaron Leventhal

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)

Related bugs

Related preferences

External links