When the __anticache__ option is passed to mitmproxy, it removes headers (__if-none-match__ and __if-modified-since__) that might elicit a 304-not-modified response from the server. This is useful when you want to make sure you capture an HTTP exchange in its totality. It's also often used during [client replay](@!urlTo("clientreplay.html")!@), when you want to make sure the server responds with complete data.

command-line | --anticache
mitmproxy shortcut | o then a