Read these links:

1. https://forum.palemoon.org/viewtopic.php?f=65&t=22399

2. https://forum.palemoon.org/viewtopic.php?f=65&t=22270

3. https://old.reddit.com/r/palemoon/comments/evywwj/how_secure...

4. https://www.palemoon.org/releasenotes.shtml