Bug 1848815 - Add a user-facing setting to enable enterprise roots import, and enable it by default. r=keeler,settings-reviewers,fluent-reviewers,desktop-theme-reviewers,flod,Itiel,Gijs

Differential Revision: https://phabricator.services.mozilla.com/D186236

browser/components/preferences/privacy.inc.xhtml

@@ -1179,6 +1179,18 @@
               "/>
     </vbox>
   </hbox>
+
+  <hbox id="certEnableThirdPartyToggleBox" align="center">
+    <checkbox id="certEnableThirdPartyToggle"
+              data-l10n-id="certs-thirdparty-toggle"
+              preference="security.enterprise_roots.enabled"
+              class="tail-with-learn-more"
+    />
+    <html:a is="moz-support-link"
+            class="learnMore"
+            support-page="automatically-trust-third-party-certificates"
+    />
+  </hbox>
 </groupbox>
 
 <!-- HTTPS-ONLY Mode -->

browser/components/preferences/privacy.js

@@ -191,6 +191,8 @@ Preferences.addAll([
 
   { id: "security.OCSP.enabled", type: "int" },
 
+  { id: "security.enterprise_roots.enabled", type: "bool" },
+
   // Add-ons, malware, phishing
   { id: "xpinstall.whitelist.required", type: "bool" },
 
@@ -450,6 +452,19 @@ var gPrivacyPane = {
     showQuickActionsGroup();
   },
 
+  _initThirdPartyCertsToggle() {
+    // Third-party certificate import is only implemented for Windows and Mac,
+    // and we should not expose this as a user-configurable setting if there's
+    // an enterprise policy controlling it (either to enable _or_ disable it).
+    let canConfigureThirdPartyCerts =
+      (AppConstants.platform == "win" || AppConstants.platform == "macosx") &&
+      typeof Services.policies.getActivePolicies()?.Certificates
+        ?.ImportEnterpriseRoots == "undefined";
+
+    document.getElementById("certEnableThirdPartyToggleBox").hidden =
+      !canConfigureThirdPartyCerts;
+  },
+
   syncFromHttpsOnlyPref() {
     let httpsOnlyOnPref = Services.prefs.getBoolPref(
       "dom.security.https_only_mode"
@@ -886,6 +901,7 @@ var gPrivacyPane = {
     this.fingerprintingProtectionReadPrefs();
     this.networkCookieBehaviorReadPrefs();
     this._initTrackingProtectionExtensionControl();
+    this._initThirdPartyCertsToggle();
 
     Services.telemetry.setEventRecordingEnabled("privacy.ui.fpp", true);
 

browser/locales/en-US/browser/preferences/preferences.ftl

@@ -1472,6 +1472,10 @@ certs-devices =
     .label = Security Devices…
     .accesskey = D
 
+certs-thirdparty-toggle =
+    .label = Allow { -brand-short-name } to automatically trust third-party root certificates you install
+    .accesskey = t
+
 space-alert-over-5gb-settings-button =
     .label = Open Settings
     .accesskey = O

modules/libpref/init/StaticPrefList.yaml

@@ -13903,7 +13903,7 @@
 # Whether or not to import and trust third party root certificates from the OS.
 - name: security.enterprise_roots.enabled
   type: RelaxedAtomicBool
-  value: false
+  value: true
   mirror: always
 
 - name: security.intermediate_preloading_healer.enabled