How can I uninstall it on "Windows 7"?
I already told you how/where you can install/remove components.
and by the way show me the line in the permission that we agreed if there was written something about browser?
Read the eula/terms. avast has the right to make changes to their products.
P.S.:This kind of aggressive promotion make people just angry, because this browser wasn't their choice.
It has nothing to do with promotion and yes it was the users choice. The users want to keep their system(s) secure and this is just a part of it.
No-one forced you to install it.
You could have done a custom installation.
And as I said, you can add/remove components you want/don't want.