Hi, where can i download a older verison of Firefox portable like 38 or 39?
thanks a lot
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They're on SourceForge here: https://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C...
But don't use them. Older versions of every browser are insecure and should not be used.
Sometimes, the impossible can become possible, if you're awesome!
If you need an older version, use FF ESR instead. It is still on 38.x
https://portableapps.com/apps/internet/firefox-portable-esr