There’s a great little free add-in for Firefox called noscript . Download it from there.
But sometimes the ads just get in the way or simply hog your bandwidth. In my personal use case, I am on a 2 GB/month limited mobile data plan whenever I leave my lair – which I do twice a month for 2 weeks in a row. And should I go above the limit my mobile provider throttles me – which all but kills e.g. online banking. Which I depend on at the end of the month.
So, economic data usage is essential when you’re on the go. noscript saves me real money this way. Added bonus: Ad-heavy pages load much faster.
h/t to Lars P who tipped me off about this
P.P.S.: Disclaimer: Tabs shown in demo surfing session have been chosen just for the fun of it and do not constitute an endorsement of spanking, Cocaine or semi-automatic rifles.