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This document is primarily intended for Firefox Enterprise users. Making sure the domains listed in this article are allowed by your firewall or other software ensures that Firefox works correctly.

{note}This document is primarily intended for Firefox Enterprise users.{/note} Making sure the domains listed in this article are allowed by your firewall or other software ensures that Firefox works correctly. =Update Service (Firefox and GMP)= https://aus5.mozilla.org =Remote Settings= https://firefox.settings.services.mozilla.com https://firefox-settings-attachments.cdn.mozilla.net https://content-signature-2.cdn.mozilla.net =Download locations for Firefox= https://download.mozilla.org https://download.cdn.mozilla.net https://archive.mozilla.org https://ftp.mozilla.org =Telemetry= https://incoming.telemetry.mozilla.org =Captive Portal Detection= http://detectportal.firefox.com =Safe Browsing= https://safebrowsing.googleapis.com =Pocket= https://img-getpocket.cdn.mozilla.net https://getpocket.cdn.mozilla.net =Firefox Accounts= https://accounts.firefox.com https://profile.accounts.firefox.com/ =Sync= https://token.services.mozilla.com https://sync-1-us-west1-g.sync.services.mozilla.com =Tracking Protection (What exactly does it do)?= https://tracking-protection.cdn.mozilla.net =Location Services= https://location.services.mozilla.com =OpenH264 Video Codec Download= http://ciscobinary.openh264.org =Widevine Content Decryption Module Download= https://redirector.gvt1.com https://clients2.googleusercontent.com =DNS over HTTPS= https://mozilla.cloudflare-dns.com https://dns.shaw.ca https://doh.xfinity.com https://firefox.dns.nextdns.io https://private.canadianshield.cira.ca =Extension Update= https://versioncheck.addons.mozilla.org/ =Extension Metadata for about:addons= https://services.addons.mozilla.org/ =New Tab Sponsored Tiles= https://contile-images.services.mozilla.com =New Tab Sponsored Stories= https://spocs.getpocket.com