firefox 完整版下载地址:
http://archive.mozilla.org/pub/firefox/releases/
如esr版本:
http://archive.mozilla.org/pub/firefox/releases/45.1.1esr/win64/zh-CN/Firefox%20Setup%2045.1.1esr.exe
https://download.mozilla.org/?product=firefox-esr-latest&os=win&lang=zh-CN
64位版本:
http://archive.mozilla.org/pub/firefox/releases/46.0.1/win64/zh-CN/Firefox%20Setup%2046.0.1.exe
http://archive.mozilla.org/pub/firefox/releases/latest/