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Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Getting frequent pop ups to spam sites, have cleared all history/cookies and restarted but no help. popup blcker also activated. Began about a month ago.

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Starting about a month ago I started getting a large number of pop ups on all my devices, iphone, ipad, macbook. I have firefox on my macbook and have tried clearing all cache and cookies, made sure popup blocker is on and it's still happening. It's not specific to a site as it happens on various sites some that are good, including our own sites. Apple genius bar told me it's the cookies but cleaning them did not help.. Happens on all my browsers on the macbook (FF, chrome, safari).

Running OS X 10.9.3 (13D65).

All Replies (6)

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This is most likely caused by another third party program installed on your computer. Most issues that occur on other browsers are not directly related to an issue with the Firefox software.

Look back at your recently installed programs and look for any suspicious ones. If you haven't installed anything on your computer recently, the issue could be caused by an infection on your computer.

Many users believe that Mac computers are immune to infection, but that is false. Although it is less likely to get an infection on a Mac computer compared to a Windows computer, it is still possible.

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Also be suspicious of extensions. You can review and disable those on the Add-ons page. Either:

  • Command+Shift+a
  • "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Extensions. Then, if in doubt, disable.

Usually a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.

Does that shut down the pop-ups?

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Do all those devices share a single router, for example, one wi-fi router? If the problem only occurs on that network, check your router configuration for hijacked DNS settings. The details are specific to your router, but what you normally would see is that your DNS settings either are received automatically from your service provider or are specified with their IP addresses.

If the IP addresses are specified and you do not recognize them or can't verify them as belonging to your ISP, try using the automatic setting or change them to Google's Public DNS servers for testing.

(I'm not sure you want to keep those permanently, however.)

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I'm not discounting a malicious application having been installed on my computer but that is not possible on the iPhone or iPad and the same behavior is happening on those as well. I"ll double check the apps though, thanks.

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@ jscher2000 - I'll definitely look into the extensions on my macbook.

Your other thought about a highjacked DNS setting is intriguing. I have a Cisco router on DHCP and get my access from Cox which is not a static IP cable service. Oddly enough this problem began during a power outage in our neighborhood, which is an odd coincidence. Is it possible that Cox's DNS is highjacked? I'll try to see if I can pinpoint the issue to a specific router/location,

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Unfortunately, mobile device also have the ability to receive infections.

If a program did hijack your Mac DNS settings, it is quite possible that your mobile devices were given the infection when they were connected to the computer in question.

As a precaution, you may want to avoid connecting devices (mobile devices, USB, external disc drives, etc.) to the computer with the issue. In addition, you may also want to avoid sending content to other users, via the internet. If these things are done, it may cause other people/devices to get the infection.