What this article covers:
How to enable third-party cookies in Chrome
How to enable third-party cookies in Safari
How to enable third-party cookies in Internet Explorer
How to enable third-party cookies in Firefox
Chrome
At the top right of your Chrome browser, click the three dots icon and then choose Settings.
Scroll down to the Privacy and security section or click on Privacy and security in the menu on the left side of your screen.
Click Cookies and other site data.
Check the Allow all cookies option.
More information can be found on Google's website.
Safari
Select Preferences... from under the Safari menu.
On the preference window, go to the Privacy tab. Next to the Website tracking entry, make sure to uncheck Prevent cross-site tracking.

More information on these settings can be found on Apple's website.
Microsoft Edge
Click on the three dots in the top right of your browser.
Click on Settings.
Click on Privacy & security.
Make sure the Cookies dropdown is set to Don't block cookies.
Firefox
In the top right corner, click the three lines icon, and select Options.
In the left pane, select Privacy & Security.
Scroll down to the Cookies and Site Data section.
Click on Manage Exceptions.
Paste https://app.unito.io into the Address of website bar and click Allow.
Click on Save Changes.