If you are using MS Edge: 

Block or unblock pop-ups in the new Microsoft Edge

1. Open Microsoft Edge, select Menu (3 dots icon on top right corner of the browser) > Settings > Site permissions

2. Select "Pop-ups and redirects".

3. Turn on "Block" to block pop-ups and turn off to allow pop-ups.

4. You can also add specific websites, for which you want to block and allow pop-ups.

If you are using Google Chrome: https://support.google.com/chrome/answer/95472?co=GENIE.Platform%3DDesktop&hl=en

If you are using Mozilla Firefox: https://support.mozilla.org/en-US/kb/pop-blocker-settings-exceptions-troubleshooting

If you are using Internet Explorer (not preferred Browser when using heathlLearn): https://www.wikihow.com/Turn-Off-the-Pop%E2%80%90Up-Blocker-in-Internet-Explorer