FIX: Firefox prevented the site from opening a pop-up window

• The Mozilla Firefox prevented this site from opening a pop-up window message due to the pop-up blockers.
• You can easily enable the pop-up windows from your Mozilla browser settings by using the method below.
• If your Mozilla prevents a site from opening a pop-up window, try switching to another browser.
• Adding the problematic website to the exception list by following our solution will also get rid of the message.

• Easy migration: use the Opera assistant to transfer exiting Firefox data, in just a few steps
• Optimize resource usage: your RAM memory is used more efficiently than Firefox does
• Enhanced privacy: free and unlimited VPN integrated
• No ads: built-in Ad Blocker speeds up loading of pages and protects against data-mining
• Download Opera

Pop-ups are small windows that open from a browser when you open a website page. Pop-up windows are often ads that pop out on website pages.

As such, some browsers include built-in pop-up blockers that stamp out pop-up ads. The Firefox browser includes a built-in pop-up blocker that provides a notification stating:

Firefox prevented this site from opening a pop-up window.

However, pop-up windows can also be a more essential addition to some websites. For example, banking sites utilize pop-up windows to provide further transaction details.

So, sometimes you might need pop-up windows to open. The solutions listed below are also useful if you encounter the following errors messages:

• Firefox prevented this site from opening a pop-up window 68.01 – This issue is mostly encountered by those using Mozilla Firefox v.68.01
• Firefox preventing from opening pop-up windows can’t open anything else – This happens when Firefox has difficulties opening up pretty much any kind of content.

How do I make Firefox open pop-up ads again?

1. Consider using a different browser
2. Enable pop-up windows in Firefox
3. Add websites to the Exceptions List
4. Switch off Pop-up Blocker extensions
5. Turn off third-party toolbar Pop-up Blockers

1. Consider using a different browser

Before going through all of the solutions mentioned below, you should first consider whether or not it would be easier to just switch to a different browser.

That being said, if you do want to go ahead and do this, might as well use a reliable tool such as Opera. Unlike Firefox, Opera is Chromium-based, which has proven itself to be far more customizable, faster, and reliable.

This makes Opera not just efficient at its job, but using it is a joy in itself since you can make the browser act as a hub of all the websites, tools, and shortcuts that you may ever need.

As for page loading issues, Opera is very fast, and it is frequently updated, so in the odd case of you ever have issues with it, it will sort itself out in no time at all.

Opera

2. Enable pop-up windows in Firefox

1. Click the Open menu button to expand Firefox’s primary menu.
2. Select Options to open the tab shown directly below.
   
3. Click Privacy on the left of the tab, and then scroll down to the Block pop-up option shown directly below.
   
4. Now deselect the Block pop-up setting.

Run a System Scan to discover potential errors

Firefox includes a Block pop-up option that’s selected by default. You can deselect that setting to turn off the Firefox pop-up notification bar.

3. Add Websites to the Exceptions List

1. To do that, press the Block pop-up setting’s Exceptions button.
2. This will open the window shown directly below.
   
3. There, enter a website URL in the text box.
4. Press Allow to add it to the exceptions list.
5. Then press the Save Changes button to save the exceptions list.
6. To erase a site from the exceptions list, select it and press the Remove Website button.

Deselecting that option will fully turn off Firefox’s pop-up blocker. Alternatively, you can keep the pop-up blocker on but add some sites you need pop-ups for to an exceptions list.

4. Switch off Pop-up Blocker Extensions

1. Press the Open menu button at the top right of the browser.
2. Click Add-ons to open the tab shown directly below.
   
3. Click Extensions on the left of the tab to open an add-on list.
   
4. Then you can press the Disable buttons for extension to switch them off.

Deselecting the Block pop-up does not always ensure that the pop-up windows open. Third-party pop-up blocker extensions can still block pop-ups in Firefox.

Thus, you might still need to switch off some Firefox extensions to enable pop-up windows.

5. Turn off third-party toolbar pop-up blockers

Third-party Firefox toolbars also block pop-up windows. The Google, AOL and Yahoo browser toolbars are three that include pop-up blockers.

You don’t usually need to remove those toolbars to enable website pop-up windows. The toolbars usually include a pop-up button that you can press to turn their pop-up blockers on or off.

When you’ve turned off the pop-up blockers, a few pop-up ad windows will also probably open from Firefox.

So it’s probably better to add sites you need to retain pop-ups on to the exceptions list instead of switching the browser‘s pop-up blocker off.

The solutions listed above will surely fix your window pop-up problems in Mozilla. Make sure to share with us any feedback regarding the subject in the comment section below.

How to Stop Pop-Ups in Firefox

By David Murphy 10 April 2014

Mozilla’s Firefox browser should automatically block pop-up windows by default. That doesn’t mean that it’s perfect, however. There are a number of reasons why you might be seeing pop-up windows throughout your normal Firefox browsing – some good and fixable, some less pleasant and, while fixable, a bit more annoying. Here are some possible culprits, and how to stop them.

Ensure Pop-Up Blocking Feature is On in Firefox

1. Click on the Firefox button in the upper-left of your browser and click on Options — it’ll pull out a little submenu when you hover over it with your mouse, but you can ignore that and just click right on the word Options.

2. Select the Content tab and make sure that “Block pop-up windows” is checked. If it isn’t, check it.

Check Your Pop-Up Blocking Exceptions

1. Follow steps 1 and 2 above.

2. Click the Exceptions button. Remove any existing exceptions.

Download a Pop-Up Blocking Extension

1. Click the Firefox button on the top left and click Add-ons.

2. Search for an ad-blocking add-on, such as Adblock Plus. It does a great job of removing the annoyances from your Web browsing, and it comes with absolutely no configuration needed to begin working. You can tweak it, yes, but it’s good to go the moment you click «Add to Firefox.»

Install an Antivirus Program

1. Search for and download a malware program such as Malwarebytes’ Anti-Malware – it’s free, it’s efficient, and it does a great job of finding all sorts of nasties on your system.

2. Run a scan your computer to see if any kind of malware is otherwise making pop-ups appear, in general, when they should not.

3. Download a program like Avast, or even Microsoft Security Essentials (preinstalled as Windows Defender for Windows 8 users), to ensure that you’ve done the most thorough job possible finding any potential malware on your PC. If you can, run these apps in Windows’ Safe Mode to ensure that you aren’t missing anything.

Uninstall Suspicious Software

1. Peruse your programs (via the Control Panel’s Programs and Features option or its Add/Remove Programs option, depending on your version of Windows) to see if there’s anything that you’ve recent installed that just doesn’t look like it belongs. Perhaps there’s a toolbar app running that’s causing all the pop-ups, or some “game” that’s actually a big advertising setup in disguise, et cetera. If you see something that looks odd – an app or game you haven’t used, don’t recognize, and looks a little sketchy (as in, isn’t something Microsoft-y) – give it a quick Google search to see if its suspicious.

Firefox prevent pop up windows

Search Support

1. Home
2. Support Forums
3. Firefox
4. Firefox prevented the site from.

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox prevented the site from opening pop up how to open?

• 4 replies
• 2 have this problem
• 1798 views
• Last reply by Ari94

On one Japanese website I got this message «Firefox prevented the site from opening pop up»

The Identity button (Gray Globe). Refer attached screen shot

I wonder how could I open web page even if Identity button is Grayed.

Any help in this regard will be appreciated.

Chosen solution

Have you tried adding the address to the FF popup blocker exceptions list? paste (without quotes) «about:preferences#content» into the url bar and press ENTER click on the «Exceptions. » button type/paste the page address, click allow then save changes. reload the page popups shouldn’t be blocked on the page you added to the exceptions list.

Hi, I followed your advice and now the website could be opened. Thank you for your help.

All Replies (4)

Does the Options button give you the option to override that?

Does the Options button give you the option to override that?

Hi, thank you for reply. No, options button does not give any option.

Does the Options button give you the option to override that?

Have you tried adding the address to the FF popup blocker exceptions list?

paste (without quotes) «about:preferences#content» into the url bar and press ENTER click on the «Exceptions. » button type/paste the page address, click allow then save changes.

reload the page

popups shouldn’t be blocked on the page you added to the exceptions list.

Chosen Solution

Have you tried adding the address to the FF popup blocker exceptions list? paste (without quotes) «about:preferences#content» into the url bar and press ENTER click on the «Exceptions. » button type/paste the page address, click allow then save changes. reload the page popups shouldn’t be blocked on the page you added to the exceptions list.

Hi, I followed your advice and now the website could be opened. Thank you for your help.

Have you tried adding the address to the FF popup blocker exceptions list? paste (without quotes) «about:preferences#content» into the url bar and press ENTER click on the «Exceptions. » button type/paste the page address, click allow then save changes. reload the page popups shouldn’t be blocked on the page you added to the exceptions list.