Old Firefox Stable for Admins

This is not for general usage, but an „admin-Jumphost“-computer/vm which needs to get flash enabled from time to time and is never used for public internet browsing…

There it might be an un-dogmatic solution to install the last Firefox 78.15 ESR Release.

Find it here: https://ftp.mozilla.org/pub/firefox/releases/78.15.0esr/win64/de/

Disable Auto-Update

That’s easy

  • Firefox Settings => Update Settings => „Disable Automatic Updates“

Disable Update-Notification

That’s harder – Firefox guys (think to) know better what’s good for their users and they don’t even provide an „about:config“-switch: fail!

Add the following registry Key:


Add the following 32-Bit DWORD


with value set to


and restart Firefox.

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