--- a/browser/components/enterprisepolicies/Policies.jsm
+++ b/browser/components/enterprisepolicies/Policies.jsm
@@ -72,16 +72,22 @@ this.Policies = {
     }
   },
 
   "cookies": {
     onBeforeUIStartup(manager, param) {
       addAllowDenyPermissions("cookie", param.allow, param.block);
     }
   },
+
+  "dont_check_default_browser": {
+    onBeforeUIStartup(manager, param) {
+      setAndLockPref("browser.shell.checkDefaultBrowser", false);
+    }
+  }
 };
 
 /*
  * ====================
  * = HELPER FUNCTIONS =
  * ====================
  *
  * The functions below are helpers to be used by several policies.

--- a/browser/components/enterprisepolicies/schemas/policies.json
+++ b/browser/components/enterprisepolicies/schemas/policies.json
@@ -110,11 +110,19 @@
 
         "block": {
           "type": "array",
           "items": {
             "type": "origin"
           }
         }
       }
+    },
+
+    "dont_check_default_browser": {
+      "description": "Don't check for the default browser on startup.",
+      "first_available": "60.0",
+
+      "type": "boolean",
+      "enum": [true]
     }
   }
 }

--- a/browser/components/enterprisepolicies/tests/browser/browser.ini
+++ b/browser/components/enterprisepolicies/tests/browser/browser.ini
@@ -1,17 +1,19 @@
 [DEFAULT]
 prefs =
   browser.policies.enabled=true
 support-files =
   head.js
   config_block_about_config.json
+  config_dont_check_default_browser.json
   config_popups_cookies_addons_flash.json
   config_setAndLockPref.json
   config_simple_policies.json
   config_broken_json.json
 
 [browser_policies_broken_json.js]
 [browser_policies_popups_cookies_addons_flash.js]
 [browser_policies_setAndLockPref_API.js]
 [browser_policies_simple_policies.js]
 [browser_policies_validate_and_parse_API.js]
 [browser_policy_block_about_config.js]
+[browser_policy_default_browser_check.js]

new file mode 100644
--- /dev/null
+++ b/browser/components/enterprisepolicies/tests/browser/browser_policy_default_browser_check.js
@@ -0,0 +1,24 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+Cu.import("resource:///modules/ShellService.jsm");
+
+add_task(async function test_default_browser_check() {
+  ShellService._checkedThisSession = false;
+  // On a normal profile, the default is true. However, this gets set to false on the
+  // testing profile. Let's start with true for a sanity check.
+
+  ShellService.shouldCheckDefaultBrowser = true;
+  is(ShellService.shouldCheckDefaultBrowser, true, "Sanity check");
+
+  await setupPolicyEngineWithJson("config_dont_check_default_browser.json");
+
+  is(ShellService.shouldCheckDefaultBrowser, false, "Policy changed it to not check");
+
+  // Try to change it to true and check that it doesn't take effect
+  ShellService.shouldCheckDefaultBrowser = true;
+
+  is(ShellService.shouldCheckDefaultBrowser, false, "Policy is enforced");
+});

new file mode 100644
--- /dev/null
+++ b/browser/components/enterprisepolicies/tests/browser/config_dont_check_default_browser.json
@@ -0,0 +1,5 @@
+{
+  "policies": {
+    "dont_check_default_browser": true
+  }
+}