What does your feature entail? What is it for? How will it affect existing workflows or user experience?
Right now, when content blocked, the user sees this:

And can only go past it if disabling via the Websetting Settings menu.
It'd be great if there was another button there that could override once. Maybe a "Proceed" instead of the Web Archive button or something.
What are the exact ways that you see a user using your proposed feature? Please go into as much detail as possible, and provide examples of how other browsers/apps implement this feature, if applicable. If your feature suggestion adds on to an existing feature, how would it work into it to extend its usefulness?
Allow user to intuitively bypass content blocking on a one-off basis.