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restrict not to change proxy setting on firefox

I am planning to use a proxy server provided by MX Logic for web site content filtering, the requirement is to configure the browser for using proxy.  On Internet Explorer, I can use Group Policy to configure it and restrict user from changing it but I cannot use Group Policy for Firefox.

How possible to restrict user from changing the proxy setting on Firefox?
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KANEWONG
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KANEWONG
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1 Solution
 
blaazeCommented:
open  a new tab in firefox and in address bar type about:config then you can see all variables in the firefox

now you can tweak as you want
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torimarCommented:
Please check out these links:

FireFox Deployment:
https://wiki.mozilla.org/Firefox:2.0_Institutional_Deployment

Locking Firefox Preferences:
http://kb.mozillazine.org/Locking_preferences

FrontMotion Firefox Community Edition: Easily deploy Firefox on the enterprise and manage it easily for free!
http://www.frontmotion.com/Firefox/fmfirefox.htm
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KANEWONGAuthor Commented:
I followed the instruction how to generate the encoded mozilla.cfg file and js file but no luck to lock the following.

Tools | Options | Advanced | Network | Settings
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torimarCommented:
I just tested it and it worked flawlessly: the "Settings" dialogue under Tools > Options > Advanced > Network > Settings still will be displayed, but all options and checkboxes are greyed out and disabled.

Here's what I did:
1. - created a 'mozilla.txt' with the content exactly as given in http://kb.mozillazine.org/Locking_preferences (I made sure not to have blank spaces at the beginning of a line)
2. - went to http://www.alain.knaff.lu/howto/MozillaCustomization/cgi/byteshf.cgi and had the file encrypted to 'mozilla.cfg'
3. - placed the mozilla.cfg in the same folder that 'firefox.exe' resides in
4. - created a 'local-settings.js' with contents as given on the page
5. - placed the local-settings.js in the following subfolder of the firefox.exe application folder: \firefox\defaults\pref. It already contained a 'firefox.js', 'firefox-branding.js' and 'reporter.js'. Note: I did not place it in the \greprefs - folder.

I think it may be step #5 where you went wrong.
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KANEWONGAuthor Commented:
hi Torimar
thanks for your steps, it woks now after follow your step to generate the mozilla.cfg file.  I believed the problem was caused by the wrong cfg file generated from other site.  Now it works.
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KANEWONGAuthor Commented:
How possible to distribute this file to more than one computers instead of drop by one by one?
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torimarCommented:
Frankly, I don't know.
This is the Firefox zone, and your question was how to restrict a user from changing proxy settings.

Your new question is a network administration issue, and should be asked in the respective OS and server zones.

But have you looked at the last link I posted (Frontmotion)? That seems to be addressing the issue.
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KANEWONGAuthor Commented:
fair enough,  when I go back those folder in ...Firefox\greprefs, the local-settings.js file and the mozilla.cfg file gone.  If firefox delete it after loading?  If I need remove the restriction; what can I do?
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torimarCommented:
If you need to remove the restrictions, just rename the local-settings.js file to, say, local-settings.xx - this should stop it from being loaded and evaluated.

Those files, the mozilla.cfg as well as the local-settings.js, do not get deleted. Neither when Firefox runs nor when it is closed down. If they got deleted, they wouldn't really work but once.
You must have looked in the wrong folders or on the wrong workstation.
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