It raises the question of how 'Open Source' Open Source can be if it is tightly controlled by companies who constantly make compatibility breaking 'improvements

It raises the question of how 'Open Source' Open Source can be if it is tightly controlled by companies who constantly make compatibility breaking 'improvements' and 'architectural changes' that funnel end users and developers through their hardware, app stores and onto their cloud storage. What browser should it be then? Rekonq, Konqueror? It appears that the Big Three would prefer desktop Linux to wither and die, or at least not go mainstream, or is just by imagination?