Several people have reported error messages stating 'Cannot load Facebook SDK. Disable any adblocker or tracking protection and try again.' This is a result of using the FireFox browser version 42.0 or greater with the 'Facebook Container' extension enabled. Below are the step to disable the 'Facebook Container' extension in the current version of the FireFox browser (v99.01).
1. Open the Application Menu (three horizontal lines button) in the upper right corner of the browser. 2. From the Application Menu drop-down, select 'Add-ons and Themes' which will open the Add-ons Manager window. 3. In the Add-ons Manager window, find the Facebook Container extension and toggle the blue toggle button to disable it. 4. Refresh or reopen the post that you were receiving the error message on.
5. Start at step 1 and repeat the process if you wish to re-enable the Facebook Container extension.