Each District-approved browser manages its pop-ups independently.
Manage pop-up blocking in Internet Explorer
In Internet Explorer, tap or click the Tools button and then tap or click Internet options
On the Privacy tab, under Pop-up Blocker, tap or click Settings.
Add and remove sites from your allow list as needed
Manage pop-up blocking in Firefox
In Firefox, open Menu>Options
Select the Content tab. Here you can enable/disable pop-up blocking behavior by checking or unchecking Block pop-up windows
To allow/disallow specific sites, click on the Exceptions… button that corresponds with Block pop-up windows.
Enter the URL of the site you would like to create an exception for in the Address of web site: field, and click Allow. The said site should appear in the exception list below.
If you would like to remove a site from the exception list, click on the site in question and then click the Remove Site button.
Click the Save Changes button.
Click Close in the Allowed Sites window, then close the Options tab.