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strange popup up in Firefox when using other applications

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JBrown
JBrown
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In the last few days, I´ve noticed that even when I don´t have Firefox (my default browser) open, if I open an application, such as MS Word or Viber a Firefox browser opens: "https://mmrtb.com/bonus/com-eu-1-9831/pt-lp1.php?c=4qz1i3cjz62z1&k=44054a8f2a8266ec8cbf5c4400bbcb38&country_code=PT&carrier=NOS&country_name=Portugal&region=Aveiro&city=Oliveira%20De%20Azemeis&isp=Nos%20Comunicacoes,%20S.A.&lang=en&os=Windows%2010&osv=&browser=Firefox&browserv=133&brand=Desktop&model=Desktop&marketing_name=Desktop&tablet=4&rheight=768&rwidth=768&e=5"

I´ve checked everything I can think of, including Temp files, browser cache. I´ve even scanned the registry and all open processes. I´ve also installed another Malware scanner / eliminator, and no spyware or viruses are found. I cannot find anything. What is coming up is something that looks like a raffle or lottery for my ISP, but that doesn´t exist. if I cut and paste the url into a different browser, it takes me to adds for adult websites.

I´ve installed a site blocker as a Firefox browser extension, but I´m still getting the window pop up. I´ve attached a screen shot of what I get now that I´m blocking it. Once I close it, it still randomly loads again.

Any help would be greatly appreciated. Thanks.

In the last few days, I´ve noticed that even when I don´t have Firefox (my default browser) open, if I open an application, such as MS Word or Viber a Firefox browser opens: "https://mmrtb.com/bonus/com-eu-1-9831/pt-lp1.php?c=4qz1i3cjz62z1&k=44054a8f2a8266ec8cbf5c4400bbcb38&country_code=PT&carrier=NOS&country_name=Portugal&region=Aveiro&city=Oliveira%20De%20Azemeis&isp=Nos%20Comunicacoes,%20S.A.&lang=en&os=Windows%2010&osv=&browser=Firefox&browserv=133&brand=Desktop&model=Desktop&marketing_name=Desktop&tablet=4&rheight=768&rwidth=768&e=5" I´ve checked everything I can think of, including Temp files, browser cache. I´ve even scanned the registry and all open processes. I´ve also installed another Malware scanner / eliminator, and no spyware or viruses are found. I cannot find anything. What is coming up is something that looks like a raffle or lottery for my ISP, but that doesn´t exist. if I cut and paste the url into a different browser, it takes me to adds for adult websites. I´ve installed a site blocker as a Firefox browser extension, but I´m still getting the window pop up. I´ve attached a screen shot of what I get now that I´m blocking it. Once I close it, it still randomly loads again. Any help would be greatly appreciated. Thanks.
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