: Provides higher fidelity for pausing execution at specific locations within a single line of code.
: This version marked the gradual release of WebRender , a GPU-based 2D rendering engine written in Rust. It shifts page rendering from the CPU to the GPU, making the browsing experience significantly smoother. Firefox Developer Edition 67
: To speed up page loads for sites like Amazon and Instagram (reported by Mozilla to be 40–80% faster), Firefox 67 began deprioritizing non-essential features and delaying setTimeout until after the page starts up. : Provides higher fidelity for pausing execution at
: If system memory drops below 400MB, the browser automatically suspends idle tabs to free up resources, reloading them only when clicked. 3. Developer Tool Updates Firefox Developer Edition 67