Note the 45.9.0 is the last release on the Firefox 45 ESR branch and this branch is no longer supported. Current is Firefox 52.2.0 ESR

• https://www.mozilla.org/en-US/firefox/organizations/all/
• https://www.mozilla.org/en-US/firefox/organizations/notes/
• https://www.mozilla.org/en-US/firefox/organizations/system-requirements/

You can drag the plus sign to the Customize palette or -> Remove from Toolbar, but that would still allow experienced users to restore this button or use keyboard shortcuts or menu items to open a new tab. You can do the same with the search bar (drag to the Customize palette).

See also:

• https://support.mozilla.org/en-US/kb/search-web-address-bar

You may want to look at a kiosk extension.

• https://addons.mozilla.org/en-US/firefox/search/?q=kiosk

Thanks cor-el, that looks to be a great solution for hiding the "plus" button and the search bar on the top (tool bar line). We are using "Autohotkey" script to restrict the users from using keyboard shortcuts to open new tab or new window.

But

1. Is there any way to hide the search engine facility that displays in the middle of the Firefox page?

2. Is there any group policy to apply for my networked users to restrict plus button and search engines.

Kindly help me on this.

Thanks

Hiding the Search Bar is quite easy. https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars

Just move it to Additional Tool and Features while in the Customize mode.

Thanks the-edmeister & cor-el for providing solution to hide the search bar and "Plus" button.

Can you please help me in which file / folder, these settings are being saved, i want to implement this for my networked/intranet users.

Thanks, Rami

Firefox stores most the the toolbar customization in JSON format in the browser.uiCustomization.state pref that you can see on the about:config page.

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

The mozilla.cfg file needs to be in the main Firefox program folder.

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

This requires a local-settings.js file in the "defaults/pref" folder where the channel-prefs.js file is located that specifies to use mozilla.cfg.

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

The mozilla.cfg file and possibly local-settings.js need 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/