Coffee Break #23

• https://www.class-central.com/report/ten-most-popular-april-2018/ — MOOC for fun and profit.
• https://protonmail.com/blog/protonmail-v3-13-release-notes/ — Even more secure encrypted email communication.
• http://thedataist.com/i-took-the-deletefacebook-challenge/ — #DeleteFacebook on the new level.