In Firefox, users should make sure that they do not have an add-on or extension that is blocking third-party cookies. There are many extensions / add-ons that may be blocking these. Here’s how you can view the extension or add-ons installed in your browser.
1.) Access the
Firefox menu at the top left corner of your browser window and then click
2.) Go to the
Extensions tab on the left side of the page. It will show the extensions currently installed in your browser.
3.) Note any extensions that may be blocking cookies (examples include BetterPrivacy and Cookie Monster extensions). You can check the functions of the extension by clicking on the
Option button. Click on the
Remove button for the extensions that block third-party cookies.
4.) Reload FarmVille and check if the envelope is working.