Mitmproxy without https decryption for cross browser testing

Hello All,

I want to use mitmproxy to automate cross browser testing. On my tests i would like to bypass basic auth authentication by sending authorization header with mitmproxy. The thing is, Since i just want to send the autorization header, i dont really need to decrypt https (also i dont want to have to install the mitmproxy cert on all test browsers). Here is my question: is there a way to use mitmproxy as a normal proxy/tunnel (withouth the man in the middle https decrypting part?)?

btw, thank u very much for this gr8 tool