Every now and then, all of the sudden a bunch of new tabs open in a separate window. This is going to be very hard to explain so think about it for a minute, they all are a word I had just searched using the search bar built into Firefox (not a third party one). For example, If I had just searched "what day is the longest day in North America" It will open 9 new tabs and they will be what.com, day.com, is.com, the.com, longest.com, and so on. There are also ads that open randomly every 20 minutes or so that leads me to believe this is some sort of adware.
The thing is, I have no idea how this could have gotten on my computer or how to get rid of it. I never download anything other than movies off thepiratebay that are from people with the skulls (trusted, MVP, whatnot).
I ran a scan with malwarebytes already and two "trojan droppers" were detected but it said they were removed, I restarted the computer and this is still happening.