diff --git a/toolkit/components/telemetry/app/TelemetryEnvironment.jsm b/toolkit/components/telemetry/app/TelemetryEnvironment.jsm
index 7c6eac92e96f..eaa87c673f6a 100644
--- a/toolkit/components/telemetry/app/TelemetryEnvironment.jsm
+++ b/toolkit/components/telemetry/app/TelemetryEnvironment.jsm
@@ -48,21 +48,6 @@ const MAX_EXPERIMENT_TYPE_LENGTH = 20;
 // eslint-disable-next-line no-unused-vars
 var Policy = {
   now: () => new Date(),
-  _intlLoaded: false,
-  _browserDelayedStartup() {
-    if (Policy._intlLoaded) {
-      return Promise.resolve();
-    }
-    return new Promise(resolve => {
-      let startupTopic = "browser-delayed-startup-finished";
-      Services.obs.addObserver(function observer(subject, topic) {
-        if (topic == startupTopic) {
-          Services.obs.removeObserver(observer, startupTopic);
-          resolve();
-        }
-      }, startupTopic);
-    });
-  },
 };
 
 // This is used to buffer calls to setExperimentActive and friends, so that we
@@ -335,22 +320,6 @@ function getSystemLocale() {
   }
 }
 
-function getIntlSettings() {
-  let osprefs = Cc["@mozilla.org/intl/ospreferences;1"].getService(Ci.mozIOSPreferences);
-  return {
-    requestedLocales: Services.locale.requestedLocales,
-    availableLocales: Services.locale.availableLocales,
-    appLocales: Services.locale.appLocalesAsBCP47,
-    systemLocales: osprefs.systemLocales,
-    regionalPrefsLocales: osprefs.regionalPrefsLocales,
-    acceptLanguages:
-      Services.prefs.getComplexValue("intl.accept_languages", Ci.nsIPrefLocalizedString)
-        .data
-        .split(",")
-        .map(str => str.trim()),
-  };
-}
-
 /**
  * Safely get a sysinfo property and return its value. If the property is not
  * available, return aDefault.
@@ -935,7 +904,6 @@ function EnvironmentCache() {
     p.push(this._loadAttributionAsync());
   }
   p.push(this._loadAutoUpdateAsync());
-  p.push(this._loadIntlData());
 
   for (const [id, {branch, options}] of gActiveExperimentStartupBuffer.entries()) {
     this.setExperimentActive(id, branch, options);
@@ -1448,9 +1416,6 @@ EnvironmentCache.prototype = {
       e10sMultiProcesses: Services.appinfo.maxWebProcessCount,
       telemetryEnabled: Utils.isTelemetryEnabled,
       locale: getBrowserLocale(),
-      // We need to wait for browser-delayed-startup-finished to ensure that the locales
-      // have settled, once that's happened we can get the intl data directly.
-      intl: Policy._intlLoaded ? getIntlSettings() : {},
       update: {
         channel: updateChannel,
         enabled: !Services.policies || Services.policies.isAllowed("appUpdate"),
@@ -1566,17 +1531,6 @@ EnvironmentCache.prototype = {
     this._currentEnvironment.settings.update.autoDownload = this._updateAutoDownloadCache;
   },
 
-  /**
-  * Get i18n data about the system.
-  * @return A promise of completion.
-  */
-  async _loadIntlData() {
-    // Wait for the startup topic.
-    await Policy._browserDelayedStartup();
-    this._currentEnvironment.settings.intl = getIntlSettings();
-    Policy._intlLoaded = true;
-  },
-
   /**
    * Get the partner data in object form.
    * @return Object containing the partner data.
diff --git a/toolkit/components/telemetry/docs/data/environment.rst b/toolkit/components/telemetry/docs/data/environment.rst
index b00768ae459d..4c53c5d1fd47 100644
--- a/toolkit/components/telemetry/docs/data/environment.rst
+++ b/toolkit/components/telemetry/docs/data/environment.rst
@@ -48,14 +48,6 @@ Structure:
         e10sEnabled: <bool>, // whether e10s is on, i.e. browser tabs open by default in a different process
         telemetryEnabled: <bool>, // false on failure
         locale: <string>, // e.g. "it", null on failure
-        intl: {
-          requestedLocales: [ <string>, ... ], // The locales that are being requested.
-          availableLocales: [ <string>, ... ], // The locales that are available for use.
-          appLocales: [ <string>, ... ], // The negotiated locales that are being used.
-          systemLocales: [ <string>, ... ], // The locales for the OS.
-          regionalPrefsLocales: [ <string>, ... ], // The regional preferences for the OS.
-          acceptLanguages: [ <string>, ... ], // The languages for the Accept-Languages header.
-        },
         update: {
           channel: <string>, // e.g. "release", null on failure
           enabled: <bool>, // true on failure
@@ -468,4 +460,3 @@ Version History
 - Firefox 61:
 
   - Removed empty ``addons.activeExperiment`` (`bug 1452935 <https://bugzilla.mozilla.org/show_bug.cgi?id=1452935>`_).
-
diff --git a/toolkit/components/telemetry/tests/unit/head.js b/toolkit/components/telemetry/tests/unit/head.js
index caff10d9ac2b..001ad047cb55 100644
--- a/toolkit/components/telemetry/tests/unit/head.js
+++ b/toolkit/components/telemetry/tests/unit/head.js
@@ -294,13 +294,6 @@ function fakePrioEncode() {
   m.Policy.prioEncode = (batchID, prioParams) => prioParams;
 }
 
-function fakeIntlReady() {
-  const m = ChromeUtils.import("resource://gre/modules/TelemetryEnvironment.jsm", {});
-  m.Policy._intlLoaded = true;
-  // Dispatch the observer event in case the promise has been registered already.
-  Services.obs.notifyObservers(null, "browser-delayed-startup-finished");
-}
-
 // Return a date that is |offset| ms in the future from |date|.
 function futureDate(date, offset) {
   return new Date(date.getTime() + offset);
diff --git a/toolkit/components/telemetry/tests/unit/test_ChildEvents.js b/toolkit/components/telemetry/tests/unit/test_ChildEvents.js
index 3c4bf4224a80..3044d7e5fd0b 100644
--- a/toolkit/components/telemetry/tests/unit/test_ChildEvents.js
+++ b/toolkit/components/telemetry/tests/unit/test_ChildEvents.js
@@ -75,7 +75,6 @@ add_task(async function() {
   do_get_profile(true);
   loadAddonManager(APP_ID, APP_NAME, APP_VERSION, PLATFORM_VERSION);
   finishAddonManagerStartup();
-  fakeIntlReady();
   await TelemetryController.testSetup();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
diff --git a/toolkit/components/telemetry/tests/unit/test_ChildHistograms.js b/toolkit/components/telemetry/tests/unit/test_ChildHistograms.js
index 02226ac22fec..d5caef0a1130 100644
--- a/toolkit/components/telemetry/tests/unit/test_ChildHistograms.js
+++ b/toolkit/components/telemetry/tests/unit/test_ChildHistograms.js
@@ -90,7 +90,6 @@ add_task(async function() {
   do_get_profile(true);
   loadAddonManager(APP_ID, APP_NAME, APP_VERSION, PLATFORM_VERSION);
   finishAddonManagerStartup();
-  fakeIntlReady();
   await TelemetryController.testSetup();
   if (runningInParent) {
     // Make sure we don't generate unexpected pings due to pref changes.
diff --git a/toolkit/components/telemetry/tests/unit/test_ChildScalars.js b/toolkit/components/telemetry/tests/unit/test_ChildScalars.js
index 4ff06d8c3431..30622ddd1416 100644
--- a/toolkit/components/telemetry/tests/unit/test_ChildScalars.js
+++ b/toolkit/components/telemetry/tests/unit/test_ChildScalars.js
@@ -140,7 +140,6 @@ add_task(async function() {
   do_get_profile(true);
   loadAddonManager(APP_ID, APP_NAME, APP_VERSION, PLATFORM_VERSION);
   finishAddonManagerStartup();
-  fakeIntlReady();
   await TelemetryController.testSetup();
   if (runningInParent) {
     setParentScalars();
diff --git a/toolkit/components/telemetry/tests/unit/test_SubsessionChaining.js b/toolkit/components/telemetry/tests/unit/test_SubsessionChaining.js
index cfaaa23fc152..0a59c449c39b 100644
--- a/toolkit/components/telemetry/tests/unit/test_SubsessionChaining.js
+++ b/toolkit/components/telemetry/tests/unit/test_SubsessionChaining.js
@@ -88,7 +88,6 @@ add_task(async function test_setup() {
   do_get_profile();
   loadAddonManager("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
 });
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryChildEvents_buildFaster.js b/toolkit/components/telemetry/tests/unit/test_TelemetryChildEvents_buildFaster.js
index c74e2073951f..9786393f9de9 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryChildEvents_buildFaster.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryChildEvents_buildFaster.js
@@ -45,7 +45,6 @@ add_task(async function test_setup() {
   do_get_profile(true);
   loadAddonManager(APP_ID, APP_NAME, APP_VERSION, PLATFORM_VERSION);
   finishAddonManagerStartup();
-  fakeIntlReady();
   await TelemetryController.testSetup();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryController.js b/toolkit/components/telemetry/tests/unit/test_TelemetryController.js
index 3a5a88ca8083..4a36ee3c491a 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryController.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryController.js
@@ -94,7 +94,6 @@ add_task(async function test_setup() {
   do_get_profile();
   loadAddonManager("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
 
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryControllerShutdown.js b/toolkit/components/telemetry/tests/unit/test_TelemetryControllerShutdown.js
index 61509d67fa62..a01f6fd757dc 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryControllerShutdown.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryControllerShutdown.js
@@ -27,7 +27,6 @@ add_task(async function test_setup() {
   do_get_profile();
   loadAddonManager("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
 
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js b/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js
index 892339a2ff5e..c25bb7c06c68 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryEnvironment.js
@@ -407,9 +407,8 @@ function checkSettingsSection(data) {
   const EXPECTED_FIELDS_TYPES = {
     blocklistEnabled: "boolean",
     e10sEnabled: "boolean",
-    intl: "object",
-    locale: "string",
     telemetryEnabled: "boolean",
+    locale: "string",
     update: "object",
     userPrefs: "object",
   };
@@ -450,23 +449,6 @@ function checkSettingsSection(data) {
     Assert.equal(typeof data.settings.attribution, "object");
     Assert.equal(data.settings.attribution.source, "google.com");
   }
-
-  checkIntlSettings(data.settings);
-}
-
-function checkIntlSettings({intl}) {
-  let fields = [
-    "requestedLocales",
-    "availableLocales",
-    "appLocales",
-    "systemLocales",
-    "regionalPrefsLocales",
-    "acceptLanguages",
-  ];
-
-  for (let field of fields) {
-    Assert.ok(Array.isArray(intl[field]), `${field} is an array`);
-  }
 }
 
 function checkProfileSection(data) {
@@ -927,20 +909,11 @@ add_task(async function test_checkEnvironment() {
   Assert.equal(AddonManagerPrivate.isDBLoaded(), false,
                "addons database is not loaded");
 
-  let data = TelemetryEnvironment.currentEnvironment;
-  checkAddonsSection(data, false, true);
-
-  // Check that settings.intl is lazily loaded.
-  Assert.equal(typeof data.settings.intl, "object", "intl is initially an object");
-  Assert.equal(Object.keys(data.settings.intl).length, 0, "intl is initially empty");
+  checkAddonsSection(TelemetryEnvironment.currentEnvironment, false, true);
 
   // Now continue with startup.
   let initPromise = TelemetryEnvironment.onInitialized();
   finishAddonManagerStartup();
-
-  // Fake the delayed startup event for intl data to load.
-  fakeIntlReady();
-
   let environmentData = await initPromise;
   checkEnvironmentData(environmentData, {isInitial: true});
 
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js b/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
index 434a91c0fc6a..2a2d3b859d32 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
@@ -53,7 +53,6 @@ add_task(async function test_setup() {
   do_get_profile(true);
   loadAddonManager("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
   finishAddonManagerStartup();
-  fakeIntlReady();
 
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetrySendOldPings.js b/toolkit/components/telemetry/tests/unit/test_TelemetrySendOldPings.js
index e087d1a8df30..34c7b9b5c456 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetrySendOldPings.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetrySendOldPings.js
@@ -136,7 +136,6 @@ add_task(async function test_setup() {
   do_get_profile();
   loadAddonManager("xpcshell@tests.mozilla.org", "XPCShell", "1", "1.9.2");
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
 
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetrySession.js b/toolkit/components/telemetry/tests/unit/test_TelemetrySession.js
index c3ba7e6ed383..a58ef31051ba 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetrySession.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetrySession.js
@@ -442,7 +442,6 @@ add_task(async function test_setup() {
   do_get_profile();
   loadAddonManager(APP_ID, APP_NAME, APP_VERSION, PLATFORM_VERSION);
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make sure we don't generate unexpected pings due to pref changes.
   await setEmptyPrefWatchlist();
 
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js b/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js
index 6cc46f29052e..0c9ff8545fd4 100644
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryTimestamps.js
@@ -22,7 +22,6 @@ add_task(async function test_setup() {
   // Telemetry needs the AddonManager.
   loadAddonManager();
   finishAddonManagerStartup();
-  fakeIntlReady();
   // Make profile available for |TelemetryController.testShutdown()|.
   do_get_profile();