Please add a proxy switch button on toolbar.
Sometime we people who live in a "WALL" download files from twitter.com etc. through proxy,and other time,for some site not be blocked, we download direct. I bought my proxy for a 10GB data plan,so I used it carefully.I have to open the option set a lot.
Please , get there a button, so users can set use proxy or not easily.

similar feature requset, but with differet thought: Is there any chance to set proxy setting for every individual task?