Fix For When Prestashop Login Page Does Not Show Login Fields, And Is Mostly Blank On Firefox.

This problem was detected via Prestashop 1.6.x.

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Reference Note: This article took about 1 hour to create.

You are here most likely because you have gone to your Prestashop login URL like normal using Firefox, but it's not possible to login, since the username field and password field are completely missing.   Most likely, all you are seeing is the page header saying Prestashop, then the Site Title, and the footer at the bottom, and nothing else in except for horizontal lines or minor graphics.

Failed Fix.

Going to Firefox menu of History >> Clear Recent History >> selecting check box for only Cache, Offline Website Data, and Cookies does not fix it.

What Worked For Me

• Trying doing the above data clearing, but also check the boxes for Active Logins and Site Preferences. 
• Then reload/refresh your Prestashop login page.
• Now you should see the normal login page with the username and password fields showing like below.
  
  

Finished

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