Mozilla Firefox Nightly for Mac

Firefox Nightly is a pre-release browser channel from Mozilla aimed at developers and technology enthusiasts, representing the most cutting-edge of Firefox's multiple release channels. It gives users early access to new browser features and improvements still under development, which will only gradually make their way into Beta and final releases. It suits people who enjoy trying new things, follow the evolution of browser technology, or need to test against new standards and features. Because it is in the development stage, it may not be as stable as the final release, so using it as a daily driver requires some trade-offs.