Google owes its existence to the open web, but today, its technological “innovations” have much to do with locking users into a “walled garden.” The latest of these is “reCAPTCHA Mobile Verification,” an experimental initiative that will let companies block users if they are running independent, "de-googled" versions of Android. These “indie Android” versions are favored by people who want to protect their privacy and their attention by blocking trackers and ads.
A significant part of the problem is the W3C making the standards relevant to web browsers and servers so complicated that the purported objective of allowing anyone to build a browser is defeated. While it is technically true that anyone can build a conformant browser, it is practically impossible for anyone without the resources of companies like Google, Apple and Microsoft to keep up. New, independent implementations are almost impossible due to the technical complexity and the anti-competitive practices of the incumbents.
According to this report:
Those are: Blink, WebKit and Gecko
What’s needed is new standards that restore the practical possibility for others to develop a compatible browser. That would help resolve or avoid this problem and many other problems that are similarly rooted in vendors attempting to control the user’s data and experience.