Open Safari
Click Safari in the top menu
Select Settings
Click the Websites tab
Click Pop-up Windows
Find the website you want to allow
Choose Allow from the dropdown next to the website
To allow pop-ups for all sites, set When visiting other websites to Allow
Close the Settings window
Open Google Chrome
Click the three dots in the top-right corner
Select Settings
Click Privacy and security
Click Site settings
Click Pop-ups and redirects
Select Sites can send pop-ups and use redirects
Add any specific websites under Allowed to send pop-ups and use redirects
Open Firefox
Click the menu button in the top-right corner
Select Settings
Click Privacy & Security
Scroll to Permissions
Uncheck Block pop-up windows
To allow specific sites, click Exceptions next to Block pop-up windows
Add the website and click Allow
Open Microsoft Edge
Click the three dots in the top-right corner
Select Settings
Click Cookies and site permissions
Click Pop-ups and redirects
Turn off Block
Add specific websites under Allow if needed