I’m switching back from Google Chrome to Firefox as my primary web browser. One thing that annoys me with Firefox is that it exits full-screen mode when you press the Escape key.

You can change this behavior with the following steps:

1. Type about:config in the address bar to access Advanced Preferences
2. If Firefox displays a warning message, click “Accept the Risk and Continue”
3. In the search box, type “escape”
4. Firefox should display a configuration item named browser.fullscreen.exit_on_escape
5. If this item’s value is false, you are good to go. If it is true, click the toggle button (⇌) on the right hand side to set it to false.
6. Close the Advanced Preferences tab.