August 2016 Current as of this review: Obsolete (but useful for legacy systems or testing)
Use Firefox 115 ESR (last version for Windows 7/8.1) or Supermium (modern Chromium for XP/Vista) instead. For old add-ons, try Waterfox Classic or Pale Moon . firefox 48.0.2
Firefox 48 marked the final version supported for users on OS X 10.6 (Snow Leopard), 10.7 (Lion), and 10.8 (Mountain Lion). Why People Still Search for Firefox 48.0.2 August 2016 Current as of this review: Obsolete
The primary driver for the Firefox 48.0.2 release was a specific affecting Windows users. The crash was caused by a compatibility conflict with Websense (now known as Forcepoint), a security and web filtering software used by many corporate environments. By quickly deploying 48.0.2, Mozilla ensured that enterprise users could continue using the browser without being locked out by immediate crashes. The Significance of the 48.x Branch Why People Still Search for Firefox 48