We need a custom firefox development, where most part of the job is to remove features. We own a web application which runs perfectly under Firefox, but the people who use it sometimes use the computer for other purposes and damage the computer infect it with virus, or other un-expected issues. Our job is about removing top menu options, removing address bar, close icon, making FF a full screen app, etc. Overall: we need a custom development which runs over FF to make the browser the ONLY...