Why, if I may ask, are you not using tabs in the browsers, rather than separate windows, and, since this is Windows 10 we're talking about, virtual desktops to organize your work in a way that makes sense for you?
It seems to me like you are, as they say in the area where I live, "going around Jake's barn," to get something that can already be accomplished slightly differently using Windows 10 built-in features and features of the web browsers themselves.