Mozilla has issued an important update that fixes a number of security issues. Firefox users should receive a notification of the updates availability within 24 or 48 hours. The update fixes the problem of how hackers could spoof SSL certificates by inserting null characters into certificates, exposed at the BlackHat conference last week. In a corporate environment you may choose to roll out the update manually. Of course, in a corporate. environment, you may. choose to. choose Check for Updates from Firefoxs Help menu.”]
Source: https://grahamcluley.com/firefox-352-released-fix-critical-security-problem/