Clear Cache and Cookies in Firefox

To clear all cookies, site data and cache, please follow steps as below.

1. Open Firefox
2. Click menu button on the top right and select Settings
3. Click Privacy & Security and go to the Cookies and Site Data section.
4. Click Clear data... button, the Clear Data dialog will appear

     .

5. Click Clear

Please see these articles to clear cache and cookies in other browsers:
Clear Cache and Cookies in Google Chrome
Clear Cache and Cookies in Internet Explorer