This speaks to a broader issue with trying to keep every hotkey at the top level when you have multiple, nested containers. There is a fantastic solution to this: have a leader key that says "I am talking to my browser", where one of the sub-commands is "pass a literal leader key through". This is the way screen/tmux and ratpoison handle key bindings, and it means there is literally zero chance of a collision that I can't trivially resolve by slightly modifying my interaction.