accessibility.browsewithcaret

最近浏览 Firefox 时，发现页面上总是有一个光标，在页面上，导致无法使用方向键控制 滚屏。

查询发现时 Firefox 的一个配置被打开了名为 accessibility.browsewithcaret 链接

Background

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

• True

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.

• False

The system caret is hidden. (Default)

UI

Firefox

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)