Pale Moon, by default, contacts a few different servers in addition to what you are surfing to.
Security-aware people may have noticed, so here is a roundup of what Pale Moon occasionally contacts for its various purposes:
- www.palemoon.org to check for updates to the browser
- blocklist.palemoon.org to check for updates to its extension blocklist
- addons.palemoon.org and versioncheck.addons.mozilla.org to check for updates to extensions
- pmsync.palemoon.net if you use Pale Moon Sync with the default server (optional)