In Chrome, click the Chrome menu icon (three dots in the upper right)

Click Settings

In the Privacy section, click Cookies and other site data

Make sure that Block third-party cookies and Block all cookies are not selected

Open the iOS Settings (gear icon)

Scroll and select Chrome, or swipe down to use the search field

Enable the Allow Cross-Website Tracking slider

In Safari, open the Safari drop-down menu and click Preferences

Click Privacy in the top panel

Ensure that Prevent cross-site tracking and Block all cookies are both unchecked

Open the iOS Settings (gear icon)

Scroll and select Safari, or swipe down to use the search field

Disable the Allow Cross-Website Tracking slider

Disable the Block All Cookies slider

On your computer, open the Firefox browser.

Click the Menu button, found at the top-right corner of the web page and marked as three horizontal lines, and then click Settings. (Note: on some OS it is called Options).

Click Privacy & security.

Choose your preferred privacy and cookie settings.
Firefox has advanced browser privacy settings: control of the privacy and cookies settings are combined together. You can choose one of the three main options for privacy and cookies management: Standard, Strict, and Custom.
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Select the Standard option, which gives you balanced privacy settings since it will allow most of the first-party cookies that most websites need to work properly and will block third-party cookies that are often used by companies to track user behavior across multiple websites. The standard option will block cross-site Tracking Cookies and social media trackers, used for website user targeting, but some third-party cookies could remain if they are not considered to be third-party Tracking Cookies. If you open a Private browser window, third-party Tracking Cookies will be blocked.
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​Strict and Custom options are used to disable cookies and other privacy settings.
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Additionally, you can manage cookies, site data, and cache already stored on your computer. Click Manage data, and you will see your stored cookies, which websites are storing cookies, how much space it takes, and other data. You could delete selected cookies.

On your phone or tablet, open the Firefox app.

Tap the Menu button next to the address bar.

Tap Settings.

Go to Privacy & Security.

Tap Allow cookies.