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How to gray out Tools > Options in menu bar

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  • Last reply by cor-el

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I've installed firefox v.35.0.1 on windows 7 64 bit with administrator user and I want to close firefox settings by grayout or disable "Options" menu in menu bar > Tools > Options for all user exept "Administrator" Pls guide me Thanks

I've installed firefox v.35.0.1 on windows 7 64 bit with administrator user and I want to close firefox settings by grayout or disable "Options" menu in menu bar > Tools > Options for all user exept "Administrator" Pls guide me Thanks

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That would help against opening the about:preferences page in a tab like is possible in current Firefox versions. If you only want to prevent users from changing specific settings then you can consider to lock involved prefs.


You can use a mozilla.cfg file in the Firefox program folder to lock prefs or specify new (default) values.

Place a local-settings.js file in the defaults\pref folder where also the channel-prefs.js file is located to specify using mozilla.cfg.

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

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

See: