--- a/pylib/mozreview/mozreview/hostingservice/hmo_repository.py
+++ b/pylib/mozreview/mozreview/hostingservice/hmo_repository.py
@@ -21,16 +21,23 @@ class HMORepositoryForm(HostingServiceFo
 
     try_repository_url = forms.CharField(
         label=_('Try Repository URL'),
         max_length=255,
         required=False,
         widget=forms.TextInput(attrs={'size': '60'}),
         help_text=_('URL for associated Try repository (if any)'))
 
+    trychooser_url = forms.CharField(
+        label=_('Trychooser URL'),
+        max_length=255,
+        required=False,
+        widget=forms.TextInput(attrs={'size': '60'}),
+        help_text=_('URL for associated trychooser page (if any)'))
+
     autolanding_enabled = forms.BooleanField(
         initial=False,
         label=_('Autoland to landing repository'),
         required=False,
         help_text=_('Allow Autolanding to landing repository'))
 
     landing_repository_url = forms.CharField(
         label=_('Autoland Repository URL'),
@@ -60,16 +67,17 @@ class HMORepository(HostingService):
 
     supports_repositories = True
     form = HMORepositoryForm
     supported_scmtools = ['Mercurial']
     repository_fields = {
         'Mercurial': {
             'path': '%(repository_url)s',
             'try_repository_url': '%(try_repository_url)s',
+            'trychooser_url': '%(trychooser_url)s',
             'landing_repository_url': '%(landing_repository_url)s',
             'landing_bookmark': '%(landing_bookmark)s',
             'required_ldap_group': '%(required_ldap_group)s',
         },
     }
 
     def check_repository(self, *args, **kwargs):
         return True

--- a/pylib/mozreview/mozreview/static/mozreview/css/review.less
+++ b/pylib/mozreview/mozreview/static/mozreview/css/review.less
@@ -70,16 +70,21 @@
   }
 }
 
 .mozreview-autoland-try-chooser-element {
   margin-bottom: 5px;
   margin-top: 5px;
 }
 
+#mozreview-trychooser-iframe {
+  width: 100%;
+  height: 200pt;
+}
+
 label[for="mozreview-autoland-try-syntax"] {
   font-weight: bold;
 }
 
 #mozreview-autoland-try-syntax {
   width: 100%;
   height: 8ch;
   box-sizing: border-box;

--- a/pylib/mozreview/mozreview/static/mozreview/js/autoland.js
+++ b/pylib/mozreview/mozreview/static/mozreview/js/autoland.js
@@ -1,16 +1,17 @@
 $(document).on("mozreview_ready", function() {
   // TODO: Stop hardcoding endpoint urls and provide them in a template.
   var TRY_AUTOLAND_URL   = "/api/extensions/mozreview.extension.MozReviewExtension/try-autoland-triggers/";
   var AUTOLAND_URL       = "/api/extensions/mozreview.extension.MozReviewExtension/autoland-triggers/";
   var COMMIT_REWRITE_URL = "/api/extensions/mozreview.extension.MozReviewExtension/commit_rewrite/";
 
   var try_trigger = $("#autoland-try-trigger");
   var autoland_trigger = $("#autoland-trigger");
+  var trychooser_url = $('#repository').data('trychooser-url') || "";
 
   function show_error(error_text) {
     $("#activity-indicator")
       .addClass("error")
       .text('')
       .append(
         $('<div/>').text(gettext('An error occurred:'))
       )
@@ -49,20 +50,35 @@
           .keypress(function(e) {
               e.stopPropagation();
           });
 
       box.width("60em");
       var html = [
         '<label for="mozreview-autoland-try-syntax">TryChooser Syntax</label>',
         '<textarea id="mozreview-autoland-try-syntax" name="mozreview-autoland-try-syntax" placeholder="try: -b do -p win32 -u all -t none"/>',
-        '<p>Enter TryChooser syntax here for your Try build. <a href="http://trychooser.pub.build.mozilla.org/" target="_blank">You can graphically build TryChooser syntax here.</a></p>',
-        '<span id="try-syntax-error">You have an error in your try syntax</span>'
+        '<p>Enter TryChooser syntax here for your Try build.</p>',
+        '<p><span id="try-syntax-error">You have an error in your try syntax</span></p>',
+        '<p><details id="mozreview-open-try"><summary>Graphically build syntax</summary><p><iframe id="mozreview-trychooser-iframe" src="' + trychooser_url + '"/></p></details></p>',
       ];
 
+      if (trychooser_url === "") {
+        html.pop();
+      } else {
+        window.onmessage = function(e) {
+          if (e.origin === new URL(trychooser_url).origin) {
+            if (e.data != "") {
+              $('#mozreview-autoland-try-syntax').val("try: " + e.data)
+            } else {
+              $('#mozreview-autoland-try-syntax').val("")
+            }
+          }
+        }
+      }
+
       for (var i = 0; i < html.length; ++i) {
         box.append($(html[i]).addClass("mozreview-autoland-try-chooser-element"));
       }
 
       box.modalBox({
           title: "Trigger a Try Build",
           buttons: [
             $('<input type="button"/>')

--- a/pylib/mozreview/mozreview/templates/mozreview/repository.html
+++ b/pylib/mozreview/mozreview/templates/mozreview/repository.html
@@ -1,7 +1,8 @@
 {% load mozreview %}
 <div id="repository"
   data-required-ldap-group="{{ review_request.repository|required_ldap_group }}"
+  data-trychooser-url="{{ review_request.repository|trychooser_url }}"
   data-autolanding-to-try-enabled="{{ review_request.repository|autolanding_to_try_enabled }}"
   data-autolanding-enabled="{{ review_request.repository|autolanding_enabled }}"
   data-landing-repository="{{ review_request.repository|landing_repository }}">
 </div>

--- a/pylib/mozreview/mozreview/templatetags/mozreview.py
+++ b/pylib/mozreview/mozreview/templatetags/mozreview.py
@@ -97,16 +97,22 @@ def autolanding_enabled(repository):
 
 @register.filter()
 def landing_repository(repository):
     try:
         return repository.extra_data['landing_repository_url']
     except (AttributeError, KeyError):
         return ''
 
+@register.filter()
+def trychooser_url(repository):
+    try:
+        return repository.extra_data['trychooser_url']
+    except (AttributeError, KeyError):
+        return ''
 
 @register.filter()
 def treeherder_repo(landing_url):
     mapping = {
         'try': 'try',
         'ssh://hg.mozilla.org/try': 'try',
         'ssh://hg.mozilla.org/projects/cedar': 'cedar',
         'ssh://hg.mozilla.org/integration/mozilla-inbound': 'mozilla-inbound',