No get rid of the malware with a anti-malware program as Avast not doing it's job before it gets in.

Please use more than 1 scanner as each uses diff tech :

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware

Save your Report and google each before deleting anything as do not want to delete something you need, If need help go to the pros :

• https://forums.malwarebytes.com/topic/9573-im-infected-what-do-i-do-now/

Post in only 1 forum, then wait.

Please let us know if this solved your issue or if need further assistance.

so i tried superantispyware first. got a lot of cookies. cleaned. then i tried malwarebytes. got a clean bill of health. opened firefox, within 2 seconds, same message came up. ran malwarebytes with firefox open, got clean bill of health.

so is this a firefox malware issue? or a false report from avast?

Well suggest use AdwCleaner

• https://www.malwarebytes.com/adwcleaner/

and Hitman Pro do not have to install, choose 1 X only, will make a folder still

• https://www.hitmanpro.com also do below please
• https://www.eset.com/ca/home/online-scanner/

Info on xml.plalmedia.com https://www.google.ca/search?q=xml.plalmedia.com&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&dcr=0&ei=gIJBWtL9I6eG0gKrrYGwCw

Please let us know if this solved your issue or if need further assistance.

ran all three. all showed no issues. had to uninstal avast for eset to run. reinstalled, and no popups so far. hopefully that's done it.

Thank you very much