Content Password Plugin not working in Firefox and Safari

Hi Support,

I am currently using your plugin Password Protect, the plugins seems to be working in Google Chrome flawlessly, however in Firefox and Safari once I enter the password to gain access to the protected content, the page refreshes and displayed the password box again.

In Google Chrome however, no issues what so ever, works perfect.

Any ideas on this one would be great, as I love how simple the plugin is.

Thank you in advance.