As December ushers in the final curtain for this rather eventful year, there is time left for one more Firefox version to be given its wings. Firefox 84 includes some interesting new features including tab order inspection, complex selector support in :not(), the PerformancePaintTiming API, and more!

DevTools gets tab order inspection

The Firefox Developer Tools have gotten a rather nice addition to the Accessibility Inspector this time around — A “Show Tabbing Order” checkbox. When checked, this toggles a visual overlay showing the tabbing order or table items on the current page. This provides a high-level overview of how the page will be navigated using the tab key, which may highlight problems more effectively than simply tabbing through the elements.

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