45.0.1esr is out https://ftp.mozilla.org/pub/firefox/releases/45.0.1esr/ use it. https://github.com/gentoo/gentoo/pull/1092
We'll release a 45.1ESR when 46.0 is released. Upstream has confirmed that 45.0 and 45.0ESR are the same, and 45.0 is not going to go stable.
can be closed now