[zzzcpan]

> Couldn't browsers have two modes of browsing

They could, they could even use click-to-play like interfaces or similar for pretty much everything that might hurt user experience or weaken their privacy, but enabling by default all of the features required to show ads is much more important for all major browsers. They are only interested in helping users as long as their backers can benefit from it, i.e. can show them ads or drmed content. Even Mozilla is like that. There is no incentive for privacy there, except for PR purposes, but PR is not something you can install on your computer. Best bet is probably to donate to privacy oriented forks and use them.