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Illinois State University

How to allow pop-up windows in Firefox

Firefox blocks pop-up windows, but you can allow specific sites to create pop-up windows when needed.

Firefox blocks pop-up windows by default. When a website tries to launch a pop-up window, Firefox blocks it but also displays a warning. Click the warning to allow pop-up windows on that site. 

To allow a pop-up window in Firefox, do the following:

  1. Launch Firefox.
  2. When you are on a website that attempts to launch a pop-up window, Firefox will block it and will display the following warning at the top of the page: "Firefox prevented this site from opening a pop-up window".
  3. Click the Options button on the warning message and do one of the following:

3a. Select Allow pop-ups for <site name> to allow all pop-up windows for the website you are currently visiting. 

3b. Select Show <address> to allow the pop-up window to appear one time only. Future pop-up windows on the same site will continue to be blocked.

Pop-up windows are now allowed. If you are trying to access a website that uses pop-up windows, you may need to reload the page to allow the pop-up windows to appear.

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