chrome extension install with c++

i need a exe software that will install my chrome extension and firefox plugin, it should download both ff and chrome file from my url, and install it this way i can edit the plugins anytime i want. it will be a really simple software to make and only install plugins in both browsers if user have both other wise only in the browser which is available. and i dont want any other company name or url in my software. should be as simple as possible and small in size i will need all the files