Google and Mozilla will no longer trust Symantec-backed digital certificates when they release Chrome 66 next month and Mozilla Firefox 60 in May. DigiCert Inc. said it has been sending mass email messages, calling customers and running webinars to make sure website owners are aware of the changes. The browser-makers established deadlines to revoke trust in digital certificates in response to a series of errors in the way they were issued and managed. Earlier this month, the website of Trustico temporarily went offline after a company claimed it had emailed the private keys of more than 20,000 digital certificates, which were later revoked.”]