My issue with most of the ads is they are often bloated, dynamic (flash-based maybe?) and EAT memory. Just turning off adblock for this page immediately raised my RAM usage from 3880 MB to about 4360 MB. 480 MB for one page! I frequently go on a Nexus binge, having as many as 20 or more Nexus tabs open, so I can pick out which mods I'm interested in from the files page, each in a new tab. Then I download them one by one from there. You can imagine how if each page requires an additional 500 MB or so then 20 pages may fill up 8-12 GB of RAM. In doing so, my browser slows down to a crawl. I'd also like to point out that while typing this, new ads keep loading and drastically slow down this simple text box, sometimes locking up the whole page while my browser waits for their connection. These ads are hogs.
