Can be handy, thanks for this, but some chrome extension/firefox add-on/etc. would be possibly better (haven't searched for such actually, strange, I should or even write such!).
Also: don't only promise! Put privacy page right there and explain what you explained here (maybe even in greater details, people love transparency), so every user we'll be able to obtain same information.
Also: don't only promise! Put privacy page right there and explain what you explained here (maybe even in greater details, people love transparency), so every user we'll be able to obtain same information.