https://www.waterfox.net/blog/waterfox-2020.02.1-release
from both 2020.02 Updater's notification

and 2020.02.1 "Waterox/ About" (no need for 2nd screenshot)
Thanks Alex for the update!
Duplicate of #1377
no, not exactly a duplicate, because https://www.waterfox.net/blog/waterfox-2020.02.1-release/ doesn't even exist, not even with a trailing slash / ;)
There's now a redirect to https://www.waterfox.net/blog/waterfox-2020.02-release/
As January's https://www.waterfox.net/blog/waterfox-2020.01-release/ was updated to include information about 2020.01.1 …
… so we can expect the February blog post to gain an update about 2020.02.1. For this, please be patient; I imagine an update after the weekend.
In the meantime, we have technical views of recent changes (since 2020.02) at:
PS for future reference, you may prefer to add web site issues (such as this) under #582
gotcha. Still, in general, whoever admins the web server needs to do some tiny bit of .htaccess magic and add a line of mod rewrite which adds a trailing slash so even URLs w/o one are being redirected properly.
Guinea pig as an example: https://www.waterfox.net/blog/waterfox-2020.02.1-release (via click onto "What's New").
I also filed this at #582
In the meantime
Also https://old.reddit.com/comments/f749i8/-/fih77m1/?context=2