Hacker News on 21 August 2020

• Telegram messaging app proves crucial to Belarus protests
• Fast.ai releases new deep learning course, libraries, and book
• Efficiency is dangerous and slowing down makes life better
• WordPressiOS Locked by App Store
• Chromium's Impact on Root DNS Traffic
• Why Did Mozilla Remove XUL Add-Ons?
• ReMarkable MicroSD (2019)
• An Update on MDN Web Docs
• Activists find camera inside box on power pole near union organizer’s home
• AI slays top F-16 pilot in DARPA dogfight simulation