Many websites tell me my browser is out of date. Firefox checks it out and tells me that 66.0.5 is the most up to date version for my machine (I'm running Windows 7 32bit with 4 GB of ROM). are all of the releases after mine meant for other operating systems?
Firefox 66.0.5 User Agent: Mozilla/5.0 (Windows NT 5.1; rv:66.0) Gecko/20100101 Firefox/66.0
80.0.1 Firefox Release
September 1, 2020 Version 80.0.1, first offered to Release channel users on September 1, 2020