Looks like there is another version of waterfox at the .org domain. Which domain is the correct one? Can you get the incorrect domain de-listed from google search results? https://waterfoxproject.org/en-US/
The downloads on both sites are hosted on the same site but they do point to different versions[2][3].
Both pages link to the same BuyMeACoffee page[4].
The GitHub repository has a link to the net[5].
But the GitHub profile of the developer links the the org[6].
Very old versions[7] and the current version[8] of the wikipedia page list the org as the official website.
The org seems to have been the site for the project since as early as 2012 according to the wayback[9].
However the net doesn't seem to have been associated with the project (or anything) before 2019[10].
The most recent crawls of the org got 301 redirected to the net[11].
[0] https://www.waterfoxproject.org
[2] https://storage-waterfox.netdna-ssl.com/releases/linux64/ins...
[3] https://storage-waterfox.netdna-ssl.com/releases/linux64/ins...
[4] https://www.buymeacoffee.com/waterfox
[5] https://github.com/MrAlex94/Waterfox
[6] https://github.com/MrAlex94
[7] https://en.wikipedia.org/w/index.php?title=Waterfox&oldid=59...
[8] https://en.wikipedia.org/w/index.php?title=Waterfox&oldid=89...
[9] http://web.archive.org/web/20120117003924/http://waterfoxpro...
[10] http://web.archive.org/web/20190418195027/https://www.waterf...
[11] http://web.archive.org/web/20190527072632/https://waterfoxpr...