> What I'd like the OS itself to do is to block by default copy/pasting between apps, with the user agreeing to each combination, with "only once" option availa

> What I'd like the OS itself to do is to block by default copy/pasting between apps, with the user agreeing to each combination, with "only once" option available. This made me think. At the cost of learning new key combinations, a clipboard manager browser extension could isolate in-browser copy/pastes from the system clipboard, unless explicitly asked.