diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index c3ad138d559af..2b7cd91a7e145 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1199,7 +1199,7 @@ pref("browser.xul.error_pages.expert_bad_cert", false);
 pref("browser.xul.error_pages.show_safe_browsing_details_on_load", false);
 
 // Enable captive portal detection.
-pref("network.captive-portal-service.enabled", true);
+pref("network.captive-portal-service.enabled", false);
 
 // If true, network link events will change the value of navigator.onLine
 pref("network.manage-offline-status", true);
@@ -1417,7 +1417,7 @@ pref("browser.zoom.full", true);
 pref("browser.zoom.updateBackgroundTabs", true);
 
 // The breakpad report server to link to in about:crashes
-pref("breakpad.reportURL", "https://crash-stats.mozilla.org/report/index/");
+pref("breakpad.reportURL", "");
 
 // URL for "Learn More" for DataCollection
 pref("toolkit.datacollection.infoURL",
@@ -2364,7 +2364,7 @@ pref("browser.tabs.remote.warmup.maxTabs", 3);
 pref("browser.tabs.remote.warmup.unloadDelayMs", 2000);
 
 // For the about:tabcrashed page
-pref("browser.tabs.crashReporting.sendReport", true);
+pref("browser.tabs.crashReporting.sendReport", false);
 pref("browser.tabs.crashReporting.includeURL", false);
 
 // If true, unprivileged extensions may use experimental APIs on
@@ -2487,7 +2487,7 @@ pref("signon.suggestImportCount", 3);
 
 // Space separated list of URLS that are allowed to send objects (instead of
 // only strings) through webchannels. Bug 1275612 tracks removing this pref and capability.
-pref("webchannel.allowObject.urlWhitelist", "https://content.cdn.mozilla.net https://install.mozilla.org");
+pref("webchannel.allowObject.urlWhitelist", "");
 
 // Whether or not the browser should scan for unsubmitted
 // crash reports, and then show a notification for submitting
@@ -2569,7 +2569,8 @@ pref("app.shield.optoutstudies.enabled", false);
 
 // Coverage ping is disabled by default.
 pref("toolkit.coverage.enabled", false);
-pref("toolkit.coverage.endpoint.base", "https://coverage.mozilla.org");
+pref("toolkit.coverage.opt-out", true);
+pref("toolkit.coverage.endpoint.base", "");
 
 // Discovery prefs
 pref("browser.discovery.enabled", true);
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 61494945afb0c..9d64dba8b0e83 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3434,7 +3434,7 @@ pref("network.captive-portal-service.maxInterval", 1500000); // 25 minutes
 pref("network.captive-portal-service.backoffFactor", "5.0");
 pref("network.captive-portal-service.enabled", false);
 
-pref("network.connectivity-service.enabled", true);
+pref("network.connectivity-service.enabled", false);
 pref("network.connectivity-service.DNSv4.domain", "example.org");
 pref("network.connectivity-service.DNSv6.domain", "example.org");
 pref("network.connectivity-service.DNS_HTTPS.domain", "cloudflare-dns.com");
@@ -3454,7 +3454,7 @@ pref("network.trr.builtin-excluded-domains", "localhost,local");
 // Whether the checkbox to display a fallback warning error page is visible in about:preferences#privacy
 pref("network.trr_ui.show_fallback_warning_option", false);
 
-pref("captivedetect.canonicalURL", "http://detectportal.firefox.com/canonical.html");
+pref("captivedetect.canonicalURL", "");
 pref("captivedetect.canonicalContent", "<meta http-equiv=\"refresh\" content=\"0;url=https://support.mozilla.org/kb/captive-portal\"/>");
 pref("captivedetect.maxWaitingTime", 5000);
 pref("captivedetect.pollingTime", 3000);
@@ -3884,8 +3884,8 @@ pref("toolkit.aboutProcesses.profileDuration", 5);
 //  * userChrome.css
 pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
 
-#ifdef MOZ_DATA_REPORTING
   pref("datareporting.policy.dataSubmissionEnabled", false);
+#ifdef MOZ_DATA_REPORTING
   pref("datareporting.policy.dataSubmissionPolicyNotifiedTime", "0");
   pref("datareporting.policy.dataSubmissionPolicyAcceptedVersion", 0);
   pref("datareporting.policy.dataSubmissionPolicyBypassNotification", false);