I have it installed on Arc and it still works, I guess that's expected but it will degrade soon? I love Arc but I'd better not see an ad or that will be reason to jump ship. I pay for quite a few web services I like (eg, Youtube) but I'd drop a bollock if I saw a display ad on the open web.
If you like Arc, I suggest trying Zen Browser. It looks and behaves just like Arc, but it has the benefit of upgrades and support. Arc Browser has almost been abandoned because they are working on a new product.
