Modern browsers require modern operating systems due to compiled dependencies. Firefox 45.0.1 was notably one of the stable versions that retained robust, out-of-the-box compatibility with older operating systems, including: Windows XP (Service Pack 3) Windows Vista
cycle, often used by organizations needing a stable, long-term version. System Requirements mozilla firefox 450 1 old version
To truly appreciate the context of this software, it’s helpful to remember what the world was like when it launched: Modern browsers require modern operating systems due to
Open the folder specific to your platform (e.g., /win32/ or /win64/ ) and choose your preferred language subfolder. out-of-the-box compatibility with older operating systems