If you manage a bunch of public desktops in a school or library setting like I do, and you have Firefox available as a browser choice (as I also do) for public use, You may be looking for an easy way to programmatically revert/disable the recent Firefox changes that cause ads to be displayed in the address bar by default.

With some digging I've figured it out.

These settings, along with others are controlled by a file named, "prefs.js" in the active user's profile directory, here..

...
You're not supposed to edit prefs.js itself, but you can create a "user.js" file with exceptions that you want and put it in the same profile directory, and Firefox will give those exceptions priority and honor them...

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