Tried with the 2 latest versions of Firefox and Chrome, both with Ad Block Plus enabled
Got the same nag message pop up in Chrome, but not with Firefox
Gave up on the Guardian years ago, prefer the ink to stay on the paper and not on my hands plus there being being more ads than news.
I occassionally read one of their sister papers (from the NE) which is published daily and you dont get any of that business on there plus they manage more news per day that the WG does in a week for only a slightly larger catchment area