Is My Firefox Outdated?
On the menu bar, click the Firefox menu and select About Firefox. The About Firefox window will appear. ... Opening the About Firefox window will, by default, start an update check. If an updated version of Firefox is available, it will be automatically downloaded.
What is the most up to date Firefox?
This was gradually accelerated further in late 2019, so that new major releases occur on four-week cycles starting in 2020. Firefox 95 is the latest version; it was released on December 7, 2021.
Firefox version history - Wikipedia