I highly suggest you read through the release notes, and the forum, to get a better understanding of the security of palemoon. Palemoon is updated regularly, in

I highly suggest you read through the release notes, and the forum, to get a better understanding of the security of palemoon. Palemoon is updated regularly, including security updates, patches and DiD(Defense in depth) fixes. These are fixes that identify potential problems, and fix them before an exploit has been found. While Palemoon was forked from firefox, the current codebase isn't stagnant, it is updated quite frequently.