There is no change in Firefox that can't be undone when Firefox is in Safe Mode. This a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).

There are free programs available on the web to block access to 'bad' websites.

I don't understand how a private window could bypass a proxy; connection settings should remain unchanged. There may be a problem with your proxy configuration.

Also, you may want to look into OpenDNS as a supplemental security and filtering service. This assumes you don't allow DNS queries to other servers to bypass OpenDNS...

https://www.opendns.com/enterprise-security/

Cause my proxy use windows integrated authentication, I have no idea of the real reason of this behavior.

Considering a corporate environment, "private mode" should be controller by system admin, and not by user, I do this in chrome and IE. Is possible in Mozilla Firefox?

You may want to look at this tool:

https://mike.kaply.com/cck2/

And the mailing list mentioned on this page:

https://www.mozilla.org/firefox/organizations/

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

A local-settings.js file needs to be placed 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

The mozilla.cfg file needs to start with a comment line (//).

See Configuration:

• https://developer.mozilla.org/en-US/Firefox/Enterprise_deployment

See also:

• http://kb.mozillazine.org/Locking_preferences
• http://mike.kaply.com/2012/03/16/customizing-firefox-autoconfig-files/

I've do this

In my local-settings.js pref("general.config.obscure_value", 0); pref("general.config.filename", "mozilla.cfg"); located in folder C:\Program Files (x86)\Mozilla Firefox\defaults\pref

It's my mozilla.cfg // lockPref("privacy.donottrackheader.enabled", false);

Located in folder C:\Program Files (x86)\Mozilla Firefox

Private mode still works!

douglasfilipe said

lockPref("privacy.donottrackheader.enabled", false);

Located in folder C:\Program Files (x86)\Mozilla Firefox

Private mode still works!

The "Do Not Track" header is a checkbox in the privacy settings. It is not related to private browsing.

Locking this pref could have some effect, but probably won't help when a command line switch (-private) is used.

• lockPref("browser.privatebrowsing.autostart", false);

jscher2000 said

douglasfilipe said

lockPref("privacy.donottrackheader.enabled", false);

Located in folder C:\Program Files (x86)\Mozilla Firefox

Private mode still works!

The "Do Not Track" header is a checkbox in the privacy settings. It is not related to private browsing.

Yes, I wanna disable "private mode" not "do not track me"

Did you look at the CCK2 extension?

cor-el said

Did you look at the CCK2 extension?

Yes I did, but, how can I install extension in five hundred machines? Manually is impossible