modified data ff header

Want a solid app that modified some data from a site like(plugins,useragent,mines etc) I'm posting ads and they colect my info like plugins useragent etc so need a application to spoof this data, they took data from request(header) when click "next". What need the app to do: -will took from my server the files of list plugins, useragent etc for spoof so can to put every time new list -have for every spoof a form on how many plugins,video resolution to put than can click generate(eg: lunch the application complete how many plugins want to have eg: 3 than took from my list 3 random plugins, and for video resul or other think the same than click generate and for that session have what I complete.) -have a strong not to crack it mean to not give to other person Ps. can modified with firefoxbug Add "real price" in bid to avoid bot bid