As I user I want my self-hosted web apps to be able to send me notifications. I want them to have access to the clipboard if I allow so. I don't want third-part

As I user I want my self-hosted web apps to be able to send me notifications. I want them to have access to the clipboard if I allow so. I don't want third-party sites to have these capabilities unless I explicitly allow one to do so in which case it should be clearly visible that the permission is granted and it should be just as easy to remove permission as it was to grant it. Fortunately I use Android which gives me the possibility to install any browser I want, in my case that means Firefox, Bromite (a Chromium fork without Google bits), Privacy Browser and Lightning. Yes, I have multiple browsers installed, both to test how they behave with things I made as well as to use them for specific purposes.