built Greasemonkey into a proxy server

My requirement: 1) Setup a proxy on my web server 2) When my employee log in, he will be redirected by the proxy 3) The URL address shown should be encrypted 4) The employee redirected via proxy, is send to an online application. 5) Upon reaching the online application via proxy, it will "Greasemonkey-up" the returned HTML to show only element that i required. Note: i only want some elements to disappear from the original website. All the rest of the functionality should not be affected. Objective: I want everyone in the office to have a “fixed” pages. When you bid, please indicate what proxy you will be using. FYI, geasemoney is only an example. If you have a better way of doing what i want, i am open for suggestion. Please bid only when you know you can do what i want. Thanks.