Performance and stability are on the menu for the last Firefox version of 2024

Bug fixes for enhanced stability

Supercharging CSS variables debugging and many more improvements to the Inspector

Important Debugger fixes and quality of life Inspector improvements

Massive performance improvements, @starting-style support and accessibility fixes

CSS registered properties, relative color syntax, specificity and important Debugger fixes!

Faster CSS tokenization, bug fixes and other improvements, see what’s new in Firefox DevTools 127

Faster Inspector Rules view, state for custom elements and more, see what’s new in Firefox 126

JS-free dynamic popups, nice performance boost, sourcemap management and bug fixes, read what’s new in DevTools in Firefox 125

DevTools at maximum performance, CSS variables, file requests and more in Firefox 124