Loose rivets,
release: The release channel will provide stable release versions, including security updates (in contrast to beta, aurora, nightly which are all non-stable and should not be used by people who are not used to the "features" of beta software....
)
Can I not look in there anymore without getting updated? My last two updates were uninvited.
At your own risk :
Stick "about
:config" (without quotes) into your URL bar and hit return.
Play with the app.update.* options, I suspect app.update.auto to false is what you're after.