The setting to enable pop up is different in different browsers
- Firefox
Open Firefox > Click 3 vertical bars on right top side > Options > Privacy & security > Scroll down and uncheck Block pop-up Windows
- Chrome
Open Chrome > Click 3 vertical dots on top right side > Settings > Scroll down and click Advanced > Content Settings > Pop up and redirects > Toggle On Blocked
- Edge
Open Edge > Click 3 horizontal dots at the top > Settings > Advanced Settings > Toggle OFF Block pop ups