So far, I have not been disappointed with AdNauseam. It works fine, I don't visit many sites with much ads, but I have not had a problem with it, period. I don't get much ads, and overall, it's been a good rides.

After watching a youtube video though, when I got out of fullscreen, I was immediately pulled into an AdNauseam tab. Additionally, there was two AdNauseam icons on my add-ons, one unconfigured, the other showing an error, saying it had been deleted when I tried to click on it.

Very bizarre.

Error message is:

"File not found

Firefox can’t find the file at chrome:///content/menu.html.

Check the file name for capitalization or other typing errors.
Check to see if the file was moved, renamed or deleted.
"

EDIT:

OS used: Windows 10
Browser: Firefox 55.0.3
I was watching a video on youtube, on fullscreen. Unfortunately, I can't link the specific video right now, I'm on mobile.

Thank you for the quick response!