Open Safari
Click Safari in the menu bar
Select Settings
Click the Websites tab
Click Pop-up Windows
Find the website you want to allow
Set the dropdown to Allow
Open Chrome
Click the three dots in the top right
Select Settings
Click Privacy and security
Click Site settings
Click Pop-ups and redirects
Select Sites can send pop-ups and use redirects
Add the website under Allowed to send pop-ups and use redirects
Open Firefox
Click the menu button
Select Settings
Click Privacy & Security
Scroll to Permissions
Uncheck Block pop-up windows
Or click Exceptions and add the website
Open Microsoft Edge
Click the three dots in the top right
Select Settings
Click Cookies and site permissions
Click Pop-ups and redirects
Turn off Block
Add the website under Allow
Reload the website after changing the setting