Vivaldi Browser

The control of Google is in almost any engine, also in Gecko. In Gecko even with Google devs itself which are working in Mozilla to develope Firefox. In this point Vivaldi is much less controlled by Google than Firefox, even using Chromium (modified by own devs).
That standards arise is not the problem and most browsers use Blink because it is simply the best engine and the most compatible with any standards.

It is irrelevant, if it is Chromium or another, if it is FOSS and allows to modify it to the taste of each browser company, using it as it is or in a gutted way. Reducing the motors to one does not present any problems, it even allows web standards to be unified, just as it would be impractical if the power plugs in each house had a different format, but this is not the case, regardless of who the manufacturer is. The lack of variety is not the problem, on the contrary.

The influence of Google is not a major problem in this regard, easily removable from the engine. This is why Google now attacks from another side with its WEI project where Mozilla and Vivaldi are precisely shouting to heaven. A system of Google Tokens, which allows to reject the connection by minority browsers, limiting the access to Chrome and perhaps also EDGE "for security and DRM reasons".

This would certainly be the death of all other browsers and the end of the free Internet with the absolute domination of Google, if this is not prevented. No, the engine has not been the problem for a long time, it is Google itself and its desire for domination the cause to intent every dirty trick for this proposit if other don't work, like in the past with FloC, idle API and others, Chromium is from Google, but it's FOSS and Google can't reverse this.

https://www.pcworld.com/article/2009730/vivaldi-mozilla-warn-of-googles-proposed-drm-for-the-web.html https://itwire.com/government-tech-news/technology-regulation/google-trying-to-corner-browser-market,-norwegian-firm-vivaldi-claims.html