diff --git a/ui/admin/app/services/window-manager.js b/ui/admin/app/services/window-manager.js
new file mode 100644
index 000000000..8c54be361
--- /dev/null
+++ b/ui/admin/app/services/window-manager.js
@@ -0,0 +1,58 @@
+import Service from '@ember/service';
+import { inject as service } from '@ember/service';
+
+/**
+ * The window manager service enables browser windows to open and close
+ * without the need to retain window references at the callsite.
+ */
+export default class WindowManagerService extends Service {
+  // =services
+
+  @service('browser/window') window;
+
+  // =attributes
+
+  /**
+   * An array of windows under management.
+   * @private
+   * @type {[Window]}
+   */
+  #managedWindows = [];
+
+  // =methods
+
+  /**
+   * Opens a new window of the specified URL via browser services.
+   * @param {string} url
+   * @see `window.open`
+   */
+  open(url) {
+    const newWindow = this.window.open(url);
+    this.add(newWindow);
+  }
+
+  /**
+   * Closes all windows under management and purges their references.
+   * @see `window.close`
+   */
+  closeAll() {
+    this.#managedWindows.forEach((window) => window.close());
+    this.purgeAll();
+  }
+
+  /**
+   * Adds a window to management.
+   * @param {Window} window
+   */
+  add(window) {
+    this.#managedWindows.push(window);
+  }
+
+  /**
+   * Resets the managed windows array.  As long as no array references are
+   * retained, this should result in the original array being GC'd.
+   */
+  purgeAll() {
+    this.#managedWindows = [];
+  }
+}
diff --git a/ui/admin/tests/unit/services/window-manager-test.js b/ui/admin/tests/unit/services/window-manager-test.js
new file mode 100644
index 000000000..f0489bdc9
--- /dev/null
+++ b/ui/admin/tests/unit/services/window-manager-test.js
@@ -0,0 +1,54 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+import { setupBrowserFakes } from 'ember-browser-services/test-support';
+import Service from '@ember/service';
+
+module('Unit | Service | window-manager', function (hooks) {
+  setupTest(hooks);
+  setupBrowserFakes(hooks, { window: true });
+
+  test('it opens window instances', function (assert) {
+    assert.expect(1);
+    const fakeURL = 'bloop://not-a-real-url';
+    // Register mock window service
+    this.owner.register(
+      'service:browser/window',
+      class extends Service {
+        open(url) {
+          assert.equal(url, fakeURL);
+        }
+      }
+    );
+    const service = this.owner.lookup('service:window-manager');
+    service.open(fakeURL);
+  });
+
+  test('it closes all open window instances and _does not_ close already-closed instances', function (assert) {
+    const instanceCount = 3;
+    const assertionsPerInstance = 1;
+    assert.expect(instanceCount * assertionsPerInstance);
+    // Register mock window service
+    this.owner.register(
+      'service:browser/window',
+      class extends Service {
+        open() {
+          return {
+            close() {
+              assert.ok(true, 'Window closed.');
+            },
+          };
+        }
+      }
+    );
+    const service = this.owner.lookup('service:window-manager');
+    for (let i = 0; i < instanceCount; i++) {
+      service.open();
+    }
+    // First, close all open instances.
+    service.closeAll();
+    // Try closeAll again, which should result in no additional assertions.
+    // See assert.expect above, which accounts for a single close call
+    // per instance.
+    service.closeAll();
+  });
+});
diff --git a/yarn.lock b/yarn.lock
index a602db36e..7e936fe49 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7578,7 +7578,7 @@ debug@~4.1.0:
   dependencies:
     ms "^2.1.1"
 
-debuglog@*, debuglog@^1.0.1:
+debuglog@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/debuglog/-/debuglog-1.0.1.tgz#aa24ffb9ac3df9a2351837cfb2d279360cd78492"
   integrity sha1-qiT/uaw9+aI1GDfPstJ5NgzXhJI=
@@ -12385,7 +12385,7 @@ import-lazy@^4.0.0:
   resolved "https://registry.yarnpkg.com/import-lazy/-/import-lazy-4.0.0.tgz#e8eb627483a0a43da3c03f3e35548be5cb0cc153"
   integrity sha512-rKtvo6a868b5Hu3heneU+L4yEQ4jYKLtjpnPeUdK7h0yzXGmyBTypknlkCvHFBqfX9YlorEiMM6Dnq/5atfHkw==
 
-imurmurhash@*, imurmurhash@^0.1.4:
+imurmurhash@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/imurmurhash/-/imurmurhash-0.1.4.tgz#9218b9b2b928a238b13dc4fb6b6d576f231453ea"
   integrity sha1-khi5srkoojixPcT7a21XbyMUU+o=
@@ -14083,11 +14083,6 @@ lodash._baseflatten@^3.0.0:
     lodash.isarguments "^3.0.0"
     lodash.isarray "^3.0.0"
 
-lodash._baseindexof@*:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/lodash._baseindexof/-/lodash._baseindexof-3.1.0.tgz#fe52b53a1c6761e42618d654e4a25789ed61822c"
-  integrity sha1-/lK1OhxnYeQmGNZU5KJXie1hgiw=
-
 lodash._baseuniq@~4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/lodash._baseuniq/-/lodash._baseuniq-4.6.0.tgz#0ebb44e456814af7905c6212fa2c9b2d51b841e8"
@@ -14096,16 +14091,11 @@ lodash._baseuniq@~4.6.0:
     lodash._createset "~4.0.0"
     lodash._root "~3.0.0"
 
-lodash._bindcallback@*, lodash._bindcallback@^3.0.0:
+lodash._bindcallback@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/lodash._bindcallback/-/lodash._bindcallback-3.0.1.tgz#e531c27644cf8b57a99e17ed95b35c748789392e"
   integrity sha1-5THCdkTPi1epnhftlbNcdIeJOS4=
 
-lodash._cacheindexof@*:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/lodash._cacheindexof/-/lodash._cacheindexof-3.0.2.tgz#3dc69ac82498d2ee5e3ce56091bafd2adc7bde92"
-  integrity sha1-PcaayCSY0u5ePOVgkbr9Ktx73pI=
-
 lodash._createassigner@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/lodash._createassigner/-/lodash._createassigner-3.1.1.tgz#838a5bae2fdaca63ac22dee8e19fa4e6d6970b11"
@@ -14115,19 +14105,12 @@ lodash._createassigner@^3.0.0:
     lodash._isiterateecall "^3.0.0"
     lodash.restparam "^3.0.0"
 
-lodash._createcache@*:
-  version "3.1.2"
-  resolved "https://registry.yarnpkg.com/lodash._createcache/-/lodash._createcache-3.1.2.tgz#56d6a064017625e79ebca6b8018e17440bdcf093"
-  integrity sha1-VtagZAF2JeeevKa4AY4XRAvc8JM=
-  dependencies:
-    lodash._getnative "^3.0.0"
-
 lodash._createset@~4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/lodash._createset/-/lodash._createset-4.0.3.tgz#0f4659fbb09d75194fa9e2b88a6644d363c9fe26"
   integrity sha1-D0ZZ+7CddRlPqeK4imZE02PJ/iY=
 
-lodash._getnative@*, lodash._getnative@^3.0.0:
+lodash._getnative@^3.0.0:
   version "3.9.1"
   resolved "https://registry.yarnpkg.com/lodash._getnative/-/lodash._getnative-3.9.1.tgz#570bc7dede46d61cdcde687d65d3eecbaa3aaff5"
   integrity sha1-VwvH3t5G1hzc3mh9ZdPuy6o6r/U=
@@ -14345,7 +14328,7 @@ lodash.pick@^4.4.0:
   resolved "https://registry.yarnpkg.com/lodash.pick/-/lodash.pick-4.4.0.tgz#52f05610fff9ded422611441ed1fc123a03001b3"
   integrity sha1-UvBWEP/53tQiYRRB7R/BI6AwAbM=
 
-lodash.restparam@*, lodash.restparam@^3.0.0:
+lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
   integrity sha1-k2pOMJ7zMKdkXtQUWYbIWuWyCAU=