How to Allow Pop-Ups in Mozilla Firefox
Allow pop-ups for one trusted site in Firefox while keeping the blocker on, or turn off blocking for every site.
To allow pop-ups for one website in Firefox, open Menu → Settings → Privacy & Security, scroll to Permissions, and select Exceptions beside the pop-up blocker. Add the site address, choose Allow, and save. This keeps pop-up blocking enabled for other sites.
Firefox blocks pop-ups by default. Mozilla’s setting label may appear as Block pop-ups and third-party redirects or Block pop-up windows, depending on the version. Use the equivalent control in your installation. Mozilla Support: Pop-up blocker settings, exceptions and troubleshooting.
Allow pop-ups for one website
- Open the Firefox menu and choose Settings.
- Select Privacy & Security.
- Scroll to the Permissions section.
- Find the pop-up blocking setting. Keep its checkbox enabled, then click Exceptions beside it.
- Enter or paste the website address that needs to open a pop-up, then choose Allow.
- Save the change. If Firefox shows a confirmation dialog, confirm it.
Return to the site and try the feature again. The exception applies to the site you entered; it does not disable the general blocker. Mozilla notes that allowing a site also affects its linked third-party redirect blocking setting.
Turn off pop-up blocking for every site
If you intentionally want to allow pop-ups broadly, go to Menu → Settings → Privacy & Security → Permissions and clear the checkbox for the pop-up blocker. Depending on your Firefox version, the label may refer to pop-up windows or pop-ups and third-party redirects.
This is a global setting: sites across your browsing can open pop-ups. Mozilla recommends caution because pop-ups can be unwanted, and blocking can interfere with some site features, including banking sites. An exception for the one site that needs a pop-up is usually the narrower setting.
Remove a site exception
- Open Settings → Privacy & Security → Permissions.
- Choose Exceptions beside the pop-up blocker.
- Select the site and choose Remove Website. Use the control to remove all entries only if you intend to clear every exception.
- Save the changes.
When an expected pop-up still does not appear
- Check the exact address. Make sure the exception matches the site that opens the window. If the flow moves to another site, that destination may need its own exception.
- Check the blocker setting. Confirm that you saved the exception and that the site appears in the exceptions list.
- Try the site action again. Some windows are opened after a click or key press because the site needs that interaction. A blocked unsolicited pop-up and a user-triggered window may behave differently.
- Consider whether it is a pop-up. Some advertisements only look like pop-up windows, and Firefox’s built-in blocker may not stop them.
- Look for another cause. Allowing a site only changes the pop-up permission; it does not guarantee that a separate site feature or unrelated problem will be fixed.
Quick comparison: exception or global setting?
| Choice | What changes | When it fits |
|---|---|---|
| Allow one site | That site can open pop-ups while the general blocker stays on. | A specific trusted site needs a pop-up feature. |
| Disable blocking | Pop-up blocking is turned off across sites. | You deliberately want a global change and understand its wider effect. |
Or skip the browser setup
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FAQ
Is pop-up blocking enabled by default in Firefox?
Yes. Mozilla says Firefox’s pop-up blocking is on by default.
Will allowing a site disable the blocker everywhere?
No. A site exception allows that site while leaving the general blocker enabled.
Why does a window open after I click even though pop-ups are blocked?
Some sites open windows in response to a click or key press because the feature depends on that interaction. Firefox may allow some of these windows.
Does allowing pop-ups stop every advertisement that looks like a pop-up?
No. Mozilla notes that some ads only resemble pop-up windows, so the built-in blocker may not stop them.
