Mozilla has been making improvements to Firefox 90 so that it integrates better on macOS. The changes include scrollbars that squish when rubber-banding, native fullscreen support, and more.
It is weekly Firefox Nightly news, Mozilla has said that it’s working on a number of items in the macOS version of Firefox to improve how native it feels. The changes outlined include scrollbars squishing during rubber-banding (hitting the bottom and top of web pages), the arrival of native fullscreen, and improvements to enhanced dark mode handling.