Setting Firefox Preferences to Default Values

Procedure

  1. In the Firefox address bar, type about:config and press Enter.
    The This might void your warranty warning page appears.
  2. Select I'll be careful. I promise!
    The about:config page appears.
  3. Search for the Preference Name dom.max_script_run_time. and select on it.
    The Enter Integer Value pop-up box appears.
  4. From the drop-down menu that appears, select Reset.