firefox: Mozilla Open Source web browser Details: USN-4637-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubuntu 16.04 LTS. Original advisory Firefox could be made to crash or run programs as your login if it opened a malicious website.
SeaMonkey is an all-in-one Internet application suite . It includes an Internet browser, advanced e-mail, newsgroup and feed client, a calendar, IRC client, HTML editor and a tool to inspect the DOM for web pages. It is derived from the application formerly known as Mozilla Application Suite.
The microcode_ctl utility is a companion to the microcode driver written by Tigran Aivazian tigranaivazian.fsnet.co.uk The microcode update is volatile and needs to be uploaded on each system boot i.e. it doesnt eflash your cpu permanently, reboot and it reverts back to the old microcode.