How to use socks in Arora browser
Arora is a lightweight web-browser with many features for security: privacy mode, AdBlock support, great socks 5 / HTTPS proxies support.
Download and install Arora
Direct link to download Windows version of Arora
Run Arora and click "Tools" then "Options"

Go to "Proxy" tab. Select "Socks5" as a type of proxy server. Fill in Host name and Port fields.
Arora supports only socks 5. And it passes DNS requests over socks by default.
Note: Arora doesn't work properly with some socks, for example socks with 27977 port.

Also if you want you could turn on "privacy mode"..
Go to "File" and click "Private Browsing..."