Capturing HTTP and HTTPS traffic on your own machine is quite simple: Using tools like Wireshark or Firebug, sniffing the local connections is only a matter of seconds. Capturing and/or altering the HTTP/HTTPS traffic of other machines in your network (such as your smartphone or other laptops) on the other hand is not so easy. Especially sniffing into SSL-secured HTTPS-connections seems impossible
![How To: Use mitmproxy to read and modify HTTPS traffic - Philipp's Tech Blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/3738b313a3cae80a9616c730efec2f91e6f0d0f9/height=288;version=1;width=512/https%3A%2F%2Fd3u5jkmuxaiujc.cloudfront.net%2Fwp-content%2Fuploads%2F2013%2F07%2F20130707-Selection001.png)