Continuing our sub-sub-tangent on adblockers, when I go to the page for uBlock for Opera, I see lots of comments like these:
It's a downhill slope and being on W7 you're already a fair way down, but OTOH you're getting used to using obsolete stuff now

I think the best bet is a port of Firefox. Not Firefox itself because there are undesirable bits and it is also heading towards the adblock buffers. I use Waterfox (pre-6 for other reasons than ads, but that's a different topic); there are others available. The issue is the upcoming addon API which the adblockers use. Notionally it can be used by malicious code to do all sorts of horrible things to the user, but that's exactly capability adblockers need. Google are pushing the 'fix' that will make life difficult for them, of course. Dunno if it's already in Chrome but Chrome is, well, Chrome.
For Youtube adverts it seems to be a tossup - I never get them whereas my partner, with same OS and almost same collection of adblockers, does. Anyroad, what works for me is
uBlock Origin the classic and simple blocker. Perma-blocked on a global basis are 3rd-party scripts, 3rd-party frames, and Google Analytics.
uMatrix same origin as uBlock but fine control: block by script, frame, image, whatever. You might have a domain mostly OK let through uBlock and then kill frames on there with this one. I guess that technically uMatrix could be used instead of uBlock, but often it is just simpler to block the entire domain. They do things slight differently.
Privacy Badger blocker of tracking domains.
Cookie Autodelete Cookies themselves aren't necessarily bad - it's the remembering them that is. This addon autodeletes them so you can allow cookies for a site so it works properly, and then when you leave (or however you've set it up) they're forgotten, negating the point of them.
Main problem with all of these is the fussiness. Got to a new site and you might end up having to enable this or that to get things working, and my partner just keeps whining about that. But still uses them

. You can, of course, save the setup for a site for when you return if you want (which you will for places you go more than once or twice, probably).