What about the techniques?
You wrote about browser extensions. Using web technologies (HTML, JavaScript)? Or using machine code (programming interfaces) provided by web browsers?
Which platforms? Mobile platforms available?
We use add-ons api, special for every browser/platform. Windows, Mac, Android, iPhone platforms modules will be provided. It's not a problem for our team. We have our own development group and we will order some units.
Some codes will be open - except of any "know-how".