USN-2743-3 unity-firefox-extension, webapps-greasemonkey, webaccounts-browser-extension update

USN-2743-1 fixed vulnerabilities in Firefox. Future Firefox updates will require all addons be signed and unity-firefox-extension, webapps-greasemonkey and webaccounts-browser-extension will not go through the signing process. Because these addons currently break search engine installations LP:...