我们都知道，大部分的网页浏览器和窗口管理器的“后退”按钮是和Backspace键关联的，这样会极大的方便并加快我们浏览时的翻页速度（我一直是左手放在键盘上按快捷键，右手鼠标的姿势找文件和看网页的，省的右手在屏幕上晃来晃去的），可是，唯独Firefox，偏偏不！实在不习惯不方便。有什么办法修改或添加Firefox的快捷键吗？

输入about：config，然后查找一个东西，把“2”改为“0”，具体的你google一会就知道了

呵呵，原来如此简单，不用Google了，你既然说把“2”改为"0"我就找值为“2”的项呗，有一行“broswer.backspace_action",值确实为“2”，改为“0”搞定！

好聪明

In Firefox in Windows operating system, when pressing the backspace key, the web page active in the window or tab will be going back one page, an action that similar to when the both Firefox and IE browser’s “Back” button, while Shift+Backspace will go forward. The backspace key is mapped to “Back” function in Firefox for Windows is for consistency with Internet Explorer.

On the other hand, Firefox in Linux by default does not map the backspace key to “Go Back” function to improve consistency with other applications running on Linux. Instead, the page will scroll up or down (when pressing Shift+Backspace key together).

The backspace as Back button feature can be easily turned on or off depending on user preference. Thus, Firefox for Windows users can disable the back function mapping to backspace key, and Firefox for Linux can enable the backspace to map to Back function easily, by using the following Firefox pref.

Type about:config in Firefox Location Box, and then confirm the warning message. Then locate the following preference name:

browser.backspace_action

Change the “browser.backspace_action” to one of the following values to reflect your intention on how the Backspace key should behaves:

0: Pressing [Backspace] will go back a page in the session history and [Shift]+[Backspace] will go forward. (Default in Windows)

1: Pressing [Backspace] will scroll up a page in the current document and [Shift]+[Backspace] will scroll down. Except Camino that does not implement any behavior for the value 1, which is unmapped. (Default in Linux builds before 2006-12-07)

Any other integer number: Any other integer value will simply unmap the backspace key. In Linux builds after 2006-12-07, the default is 2.