If you need to lock some parameter to some specific value and disallow user to change it then you need to define this definition elsewhere and by lockPref statement.Īnd in a corporate environment you can define(and lock) such setting at the level of Domain Controller. If you modify this file while Firefox is running then most likely any tweaks/changes made to this file will be lost. You can set initial value for some parameter (or override it) but user is able to change these parameters in UI (about:config) and firefox will overwrite this file. This file(prefs.js) is text file which can be edited by text editor. To make change permanent (to block user's meddlings with parameter via GUI) you can lock it: lockPref("tting","setting-value") Such definition of parameter allows user to change it. Typically user preferences are stored in prefs.js file in theirs profile and particular parameter is defined as: pref("tting","setting-value") it is importantĪnd use 0 to disable it: //keep comment at first line. C:\Program Files\Mozilla Firefox\my-conf.cfg): //keep comment at first line. Waterfox: A Firefox Fork If you would rather stick to a more traditional approach, u/Cifra85 made a Reddit post on how to install a portable Firefox Browser which comes bundled with an older version of Flash Player: Simple solution to use FLASH after January 12 2021. Pref("", "my-conf.cfg") Īlso place my-conf.cfg file into top-level directory where FF is installed (i.e. You must start the file with a single-line comment! Create new file "C:\Program Files\Mozilla Firefox\defaults\pref\autoconfig.js" and place following content into it: // Any comment.
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