Safari web extension bug

from blog The Desolation of Blog, | ↗ original
Yesterday Apple released Safari 14 for macOS Catalina and Mojave. This may be surprising, if you weren't expecting Safari 14 until macOS Big Sur, but in retrospect, last year Apple released Safari 13 for Mojave and High Sierra before Catalina, and the previous year Apple released Safari 12 for High Sierra and Sierra before Mojave, so we should have known that Safari 14 was coming "early". Apple actually releases major macOS Safari updates simultaneously with major iOS updates (such as iOS 14 yesterday), because iOS also contains major Safari updates. The iOS and macOS versions of Safari share code — and thus security vulnerabilities! — so Apple has to release security fixes on both platforms simultaneously, otherwise one platform's update would zero-day the other platform.