While users can still find version 45.0.1 in Mozilla's FTP directory or on sites like OldVersion.com, Mozilla strongly advises against using legacy browsers for daily tasks.
The update addressed potential performance lags on heavy sites like YouTube.
This version disabled the Graphite font shaping library to mitigate potential security or stability risks. System Requirements and Compatibility mozilla firefox 450 1 old version
Firefox Thinks It's Running an Older Version Than Last Time (But Isn't!)
Released just eight days after the major 45.0 update, version 45.0.1 was primarily a designed to address regressions that appeared in the initial launch. While users can still find version 45
To maintain enterprise compatibility, non-standard jar: URIs were brought back to fix a regression affecting IBM iNotes .
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 The ESR version was specifically designed for organizations
Developers fixed a regression in the location bar and an issue where the list of search providers could appear empty.