Siphon very useful but also doubtful Rated 3 out of 5 stars

A very useful und well working extension or add-on, nice!
But installation asks for your email address and password.
What for?
In fact only a username and login is required to create an account on http://siphon-fx.com/

Real email address may be useful for recovery of lost password.

So only use one way or other email account. NEVER your main.