s/(?<=usual )seven/couple dozen/;
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Most of us could, definitely. The overriding, ongoing point being, you couldn’t. You go on and on about your expertise and decades of experience with 5,000 programming languages, and how easy it all is for you. Your bragging makes you sound like you should easily be a guru, the guru, but there is not a lazier, less helpful monk in the monastery. Whoever is giving you your handful of upvotes here and there are either new and shallow readers or doing it out of pity because they think I and others are picking on you. I’m not your enemy though. You only have one real enemy here.

Now, my turn to be lazy. Instead of refuting your points by spending 45 minutes looking up specifics and links and trying to write it up, I’ll just provide one giant contrary data point: gmail cookies/sessions were hackable for years, on any browser, on any OS.