I downloaded music using one of the youtube to mp3 converters, and I think that they infected my machine with some ad software. I keep getting a popup at the top of my screen every 30 min to 1 hour or so. How can I figure out what is causing this and fix it?
PS: I have Ubuntu 19.04. Also, I tried deleting the song file, but that didn't help. I downloaded the song using https://ytmp3.cc/en1/ (a Youtube to MP3 converter)
From the comments...
If you were using Firefox at any time in this process, you've probably got a nasty cookie. Go to Firefox preferences and look at cookies, sorted by date, and delete any cookies that have a date close to when all of this happened... especially ones from sites that you don't recognize...
ie: irritating_game_ads.com