Download Old Version Firefox [upd] Jun 2026

Older Firefox versions have unpatched security vulnerabilities . Only use them for testing legacy websites, web development, or running old extensions. Do not use them for everyday browsing (banking, email, logging into accounts).

Navigate to the official directory, choose the version number, and then select your operating system (e.g., win64 , mac , or linux ) and language (e.g., en-US ). download old version firefox