If Virtru suddenly disappears from Chrome, the extension has failed to properly “hook” into the Gmail interface. To get Virtru back:
1) Open your extensions page at chrome://extensions
2) Click the Trash icon next to Virtru to uninstall
3) Reinstall Virtru from www.virtru.com/get-secure-email
4) Refresh Gmail
Virtru only needs these permissions so the extension can properly integrate with your email account and ensure activation. Virtru does not have access to your email content, passwords, browser history, or other personal data.