IE popads keep coming up even when using Firefox

I don't use IE anymore but for the past four days, when I'm browsing the internet using Firefox, popup ads that are from Internet explorer keep coming up...when I go to task manager the Internet Explorer process is running even though I haven't opened it. Now, my Firefox lags sometimes and the ads keep coming up (usually when I open a new tab)

I've attached my HJT Log...pretty clueless about how to fix these sorts of things so any help, as detailed as possible, would be appreciated.
 
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