Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

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

Are there any instructions for locking preferences in Firefox 8? I need to prevent users amending the proxy settings.

  • 2 tontu
  • 2 am na jafe-jafe bii
  • 4 views
  • i mujjee tontu mooy stewmang

more options

Created byteshifted mozilla.cfg file called by local-settings.js with line: lock_Pref("network.proxy.type", 0);

Whilst I can launch firefox with no errors, the proxy settings are still available.

Also is it possible to set user preferences and lock them within the same mozilla.cfg file?

Created byteshifted mozilla.cfg file called by local-settings.js with line: lock_Pref("network.proxy.type", 0); Whilst I can launch firefox with no errors, the proxy settings are still available. Also is it possible to set user preferences and lock them within the same mozilla.cfg file?

Saafara biñ tànn

The name of the function is lockPref().
Also make sure that the first line is a comment line(//)

//
lockPref("network.proxy.type", 0);

See:

You can use these functions in mozilla.cfg:

defaultPref();  // set new default value
pref();         // set pref, but allow changes in current session
lockPref();     // lock pref, disallow changes
Jàng tontu lii ci fi mu bokk 👍 0

All Replies (2)

more options

Saafara yiñ Tànn

The name of the function is lockPref().
Also make sure that the first line is a comment line(//)

//
lockPref("network.proxy.type", 0);

See:

You can use these functions in mozilla.cfg:

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

As well as having an incorrect underscore in the function name I was also byteshifting the mozilla.cfg file. When I amended the function name and left the file in clear text the proxy settings were locked. It won't work with the byteshifted file. Thanks for your help.