This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Changing the default channel-prefs.js

  • 1 reply
  • 1 has this problem
  • 14 views
  • Last reply by cor-el

igic
igic
more options

Hi,

i have been given task to change config for Mozilla ESR users in our company. I'm trying to change the value "security.enterprise_roots.enabled" which is disabled by default in update channel "esr". Is it safe to push (mass copy) new file "channel-prefs.js" with modified preference or there is another way?

pref("app.update.channel", "esr"); /* extra code */ pref("security.enterprise_roots.enabled", true);

Hi, i have been given task to change config for Mozilla ESR users in our company. I'm trying to change the value "security.enterprise_roots.enabled" which is disabled by default in update channel "esr". Is it safe to push (mass copy) new file "channel-prefs.js" with modified preference or there is another way? pref("app.update.channel", "esr"); /* extra code */ pref("security.enterprise_roots.enabled", true);

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

No you shouldn't modify this file, but instead use a mozilla.cfg file in the main Firefox program folder.

You can use the mozilla.cfg file in the Firefox program folder to set or lock preferences and run privileged JavaScript code.

The mozilla.cfg file needs to be in the main Firefox program folder.

These functions can be used in the mozilla.cfg file: 

defaultPref();	// set new default value
pref();	// set pref, allow changes in current session
lockPref();	// lock pref, disallow changes

This requires a local-settings.js file in the "defaults/pref" folder where the channel-prefs.js file is located that specifies to use mozilla.cfg. 

//
pref("general.config.filename", "mozilla.cfg");
pref("general.config.obscure_value", 0);

The mozilla.cfg and local-settings.js files need to start with a comment line (//).

See Configuration:

See also: