Oct 29, 2018

Firefox - Reset to Default - Windows 7 Help Forums Jul 15, 2015 How to Completely Reset Firefox on Windows/Mac/Linux Jan 25, 2015

Oct 21, 2019

The easiest way to do this is to configure your Firefox to use a PAC with a file URL, and then change the file URL from the line command before you start Firefox. This is the easiest way. You don't have to write a script that remembers what path to prefs.js is (which might change over time).

3 Ways to Start Firefox in Safe Mode - wikiHow

Command line arguments - MozillaZine Knowledge Base Oct 29, 2018 List of All Mozilla Firefox about commands - Config Apr 01, 2018 How to Restore Firefox to Its Default Settings and Start Fresh Nov 14, 2017 How To Set File App Association From Command Prompt On