For OS X and Linux, run the following command to update

curl -L git.io/cow | bash

For Windows, please download from http://dl.chenyufei.info/cow/

• Share server connections between different clients
• Add tunnelAllowedPort option to limit ports CONNECT method can connect to
• Avoid timeout too soon for frequently visited direct sites
• Fix reporting malformed requests in two cases when request has body:
  • Authenticate requests
  • Error occured before request is sent
• Support multi-lined headers
• Change client connection timeout to 15s
• Change as direct delta to 15
• Provide ARMv5 binary