Firefox 45.0.1 addressed several regressions and bugs discovered after the 45.0 launch:
However, there are a few issues here:
Firefox 45.0.1 was also launched as part of the cycle. The ESR version was specifically designed for organizations like schools and businesses that required a stable, long-term browser version without the frequent feature updates of the standard release channel. Risks of Using Old Versions mozilla firefox 450 1 old version