Clear the cache

  1.  Click the menu button   New Fx Menu and choose Preferences.
  2.  Select the Advanced panel.
  3.  Click on the Network tab.
  4.  In the Cached Web Content section, click Clear Now.
      clear cache incontent
  5.  Close the about:preferences page. Any changes you've made will automatically be saved.

Automatically clear the cache

You can set Firefox to automatically clear the cache when Firefox closes:

  1.  Click the menu button   New Fx Menu and choose Preferences.
  2.  Select the Privacy panel.
  3.  In the History section, set Firefox will: to Use custom settings for history.
  4.  Select the check box for Clear history when Firefox closes.
       clearhistorywhenFXclosesfx42
  5.  Beside Clear history when Firefox closes, click the Settings… button. The Settings for Clearing History window will open.
  6.  In the Settings for Clearing History window, put a check mark next to Cache.
      SettingsForClearingHistoryFX42bd
  7.  Click OK to close the Settings for Clearing History window.
  8.  Close the about:preferences page. Any changes you've made will automatically be saved.