Ubuntu Security Notice 4353-2 - USN-4353-1 fixed vulnerabilities in Firefox. The update caused a regression that impaired the functionality of some addons. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, bypass security restrictions, spoof the URL bar, or execute arbitrary code.
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