How do you lock the backspace key?

The backspace key can be disabled by modifying a browser's default configuration settings. Major browsers, such as Firefox, have a built-in functionality that automatically sets the backspace key as the browser's back button when keyboard focus is not on a text field.

Mozilla provides the following steps to lock the backspace key.

1. Type "about:config" into Firefox

Ensure that there are no leading words to "about:config" in the address bar, such as "http://" or "www." Press the enter key after typing the command.

2. Read Mozilla's warning message

Select or deselect the checkbox that comes with the warning message. Click on "I'll be careful. I promise!" to proceed.

3. Set the integer preference to 2

Locate "browser.backspace_action" from a list of options. Double-click on it to open a pop-up dialogue box. Input "2" in the textbox. Click "OK" to disable the backspace key from its default browser action.