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It is interesting to know that Mozilla provides a mechanism for us to lock any preferences in the option menu. If you would like to play with it, follow these instructions:

1. Go to Tools > Options...
2. Change the setting of the preference you want to lock.
   e.g. lock General > Home Page Location to "about:blank".
3. Open "about:config" to find the key of the preference. Use the filter field to save your time from scrolling up and down.
   e.g. Type in "homepage" and you can find "browser.startup.homepage".
4. Open a notepad and write in the following lines:
   //
lockPref("browser.startup.homepage", "about:blank");
5. Save it as Mozilla.txt and do byte shift with an offset of 13. Use this byte shift service. You will receive a file "mozilla.cfg", which you must save it at the location of firefox.exe.
6. Add the following line to "C:\Program Files\Mozilla Firefox\greprefs\all.js" file:
   pref("general.config.filename", "mozilla.cfg");

You will find your homepage field in options uneditable after that.

Reference:
Locking Mozilla Firefox Settings

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Tags: Firefox

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earl-ku says:

a kiosk function built in now?

but i prefer the original [x] location, far right, not on every single tab, sometimes switching too fast between tabs will result in closing a few …

i am on FF2.0

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EngLee says:

I’m not sure about that. I have not upgraded to 2.0. Too busy to keep myself updated with all the stuffs.

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Igor says:

or install Public Fox https://addons.mozilla.org/firefox/3911/

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Jahid Ahmed says:

//
lockPref(“network.proxy.type”, 1);
lockPref(“network.proxy.http”, “192.168.1.15”);
lockPref(“network.proxy.http_port”, 8080);
lockPref(“network.proxy.ftp”, “192.168.1.15”);
lockPref(“network.proxy.ftp_port”, 8080);
lockPref(“network.proxy.gopher”, “192.168.1.15”);
lockPref(“network.proxy.gopher_port”, 8080);
lockPref(“network.proxy.ssl”, “192.168.1.15”);
lockPref(“network.proxy.ssl_port”, 8080);
lockPref(“network.proxy.no_proxies_on”, “localhost,127.0.0.1”);
lockPref(“network.proxy.socks”);
lockPref(“network.proxy.socks_port”);
lockPref(“network.proxy.socks_version”, 5);
lockPref(“network.proxy.share_proxy_settings”, false);
lockPref(“browser.startup.homepage”, “http://www.blyda.org/|http://www.google.co.uk/”);

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wb says:

Dear sir,

i would like some question to ask you about lock config of firefox.

i need to cancel menu (right mouse click of firefox) of “set as desktop background” , can i do ?? if yes, please kindly suggest me 🙂

i need to do some way to protect my users, they always set some ugly picture to desktop. so i think if i can cancel this menu, may be that problem will disappear.

i hope you can help suggestion me 🙂

thank you very much in advance.

🙂

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EngLee says:

You might want to disable the right click menu?

Here’s the way of doing it: How to disable right click in Firefox

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bheem says:

Please tell me how i can lock the home page of the mozilla firefox.

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Istanbul says:

Hi,

How can I lock settings in firefox 3.0.4 and above. The instructions given at the beginning of the page did not work. Any ideas?

Thanks.

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Download Free Photos says:

How can I add “no proxy for” ?

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vdias says:

thanks for the tip!

Mine looks like this…
//
lockPref(“browser.shell.checkDefaultBrowser”, false);
lockPref(“app.update.enabled”, false);
lockPref(“network.proxy.type”, 2);
lockpref(“network.proxy.autoconfig_url”, “http://xxxxxxx.com/proxy.pac”);
lockPref(“browser.startup.page”, 1);
lockPref(“browser.startup.homepage”, “http://xxxxxxx.com/”);