...
Open "Preferences" from Safari Menu
With "Preferences" open, click the "Privacy" tab. Follow either of the two steps below, depending on your versions of Safari
Under "Cookies and website data " click "Always Allow." At the bottom of the Privacy tab, make sure that Safari's "Do Not Track" feature is unchecked.
...
Make sure that "Prevent cross-site tracking" and "Block all cookies" are both unchecked.
Safari on iPhone (iOS)
Return to the home screen by pressing the round button underneath the screen. Then, find the :Settings" icon and tap on it.
Scroll down and tap on the "Safari" item.
Make Sure that both "Prevent cross-site tracking" and "Block all cookies" are unchecked.
You will need to restart Safari before the settings take full effect.
Google Chrome
Click or tap on the "Customize and control Google Chrome" button from the top-right corner of the window. It looks like three dots arranged vertically. In the menu that opens, go to "Settings."
Scroll down and click "Advanced" at the bottom of the window.
Scroll down to "Privacy and security," and click "Site Settings."
In the "Permissions" section, click on "Cookies and site data."
...
Set the "Block third-party cookies" switch to "off"; make sure that the circle is on the left and the bar is gray.
Mozilla FireFox
Click on the "menu" button in the top-right corner. In the menu that opens, choose "Options."
In the "Options" tab, choose "Privacy & Security" on the left.
Make sure this is set to "Standard."