diff --git a/experimenter/experimenter/features/manifests/experimenter/developer.fml.yaml b/experimenter/experimenter/features/manifests/experimenter/developer.fml.yaml
index 1c30966527..25720bfb76 100644
--- a/experimenter/experimenter/features/manifests/experimenter/developer.fml.yaml
+++ b/experimenter/experimenter/features/manifests/experimenter/developer.fml.yaml
@@ -3,7 +3,7 @@ version: 1.0.0
 about:
   description: Nimbus Feature Manifest for Experimenter Web testing
 channels:
-  - dev
+  - developer
 features:
   example-feature:
     description: An example feature.
diff --git a/experimenter/experimenter/features/manifests/fenix/.ref-cache.yaml b/experimenter/experimenter/features/manifests/fenix/.ref-cache.yaml
index d08001cce6..b5605596ff 100644
--- a/experimenter/experimenter/features/manifests/fenix/.ref-cache.yaml
+++ b/experimenter/experimenter/features/manifests/fenix/.ref-cache.yaml
@@ -1,3 +1,3 @@
-beta: b99159baa2e5006d3a9dc51b033988849ecc6e9c
-main: 49876184a1519ffb2548d1d2bd5de031018b0779
-release: e4da2667b3056ec45b012279dea6686ba60e5be4
+beta: d21043496198132a11f308418cd747a33e462a1e
+main: 457ce1c206204a180ead36ef787f992690c3c99f
+release: 2d31f673efdc7d994d8be70b8cf87aa304a12e51
diff --git a/experimenter/experimenter/features/manifests/firefox-desktop/.ref-cache.yaml b/experimenter/experimenter/features/manifests/firefox-desktop/.ref-cache.yaml
index c8f8080cf4..2a082bd03b 100644
--- a/experimenter/experimenter/features/manifests/firefox-desktop/.ref-cache.yaml
+++ b/experimenter/experimenter/features/manifests/firefox-desktop/.ref-cache.yaml
@@ -1,6 +1,6 @@
-beta: 5727589b958b2c7c9a5245d89d3667f6d44e7f8b
-central: eb2b9607e7b8f901ada02bb6ed7113a0a6640833
+beta: 92c36006941ce1846a37e1613c0b7dc9e68f9466
+central: ed28bde759c16860d3ee821ad3e4740150099212
 esr115: 9fd18f4657dc19cd1e149171c52b1ad8234c50b7
 esr128: f5b525f4d4b143d688dd92f234b49a7433449604
-esr140: 39af27d2c6a5f53f7277766447ddc5a13d21743c
-release: c9d5a2e743e3e31e391d23ceb63024a6125000b1
+esr140: 6ba55c021f7a65a289ffe92009fcb81885d3868b
+release: f318c7723a0ac0e6bc42cef7020538019d058f2b
diff --git a/experimenter/experimenter/features/manifests/firefox-desktop/experimenter.yaml b/experimenter/experimenter/features/manifests/firefox-desktop/experimenter.yaml
index fad2063c36..ee73ac2718 100644
--- a/experimenter/experimenter/features/manifests/firefox-desktop/experimenter.yaml
+++ b/experimenter/experimenter/features/manifests/firefox-desktop/experimenter.yaml
@@ -1004,6 +1004,18 @@ newtabAdSizingExperiment:
       description: >-
         Medium rectangle (MREC) ad size and UI.
 
+newtabPromoCard:
+  description: about:newtab reporting ads feature
+  owner: achurchwell@mozilla.com
+  hasExposure: false
+  variables:
+      enabled:
+        type: boolean
+        description: Turns on and off the promo card.
+        setPref:
+          branch: user
+          pref: browser.newtabpage.activity-stream.discoverystream.promoCard.enabled
+
 newtabAdsReporting:
   description: about:newtab reporting ads feature
   owner: rhamoui@mozilla.com
diff --git a/experimenter/experimenter/features/manifests/firefox-desktop/v143.0.0/experimenter.yaml b/experimenter/experimenter/features/manifests/firefox-desktop/v143.0.0/experimenter.yaml
index fad2063c36..ee73ac2718 100644
--- a/experimenter/experimenter/features/manifests/firefox-desktop/v143.0.0/experimenter.yaml
+++ b/experimenter/experimenter/features/manifests/firefox-desktop/v143.0.0/experimenter.yaml
@@ -1004,6 +1004,18 @@ newtabAdSizingExperiment:
       description: >-
         Medium rectangle (MREC) ad size and UI.
 
+newtabPromoCard:
+  description: about:newtab reporting ads feature
+  owner: achurchwell@mozilla.com
+  hasExposure: false
+  variables:
+      enabled:
+        type: boolean
+        description: Turns on and off the promo card.
+        setPref:
+          branch: user
+          pref: browser.newtabpage.activity-stream.discoverystream.promoCard.enabled
+
 newtabAdsReporting:
   description: about:newtab reporting ads feature
   owner: rhamoui@mozilla.com
diff --git a/experimenter/experimenter/features/manifests/focus-ios/.ref-cache.yaml b/experimenter/experimenter/features/manifests/focus-ios/.ref-cache.yaml
index a8a77da08b..90e47162c8 100644
--- a/experimenter/experimenter/features/manifests/focus-ios/.ref-cache.yaml
+++ b/experimenter/experimenter/features/manifests/focus-ios/.ref-cache.yaml
@@ -20,7 +20,7 @@ focus/klar-v138.0: 33f7f00718adf88505d1804ccedb56750b04f2fb
 focus/klar-v139.0: 0a40db672ac6d422377ae4394dcbaae878998e9e
 focus/klar-v140.0: 2d3684ce1d30402082a7d37b3df58e0c672ac4ab
 focus/klar-v141.0: 2d2a8b3fcd4a112fa6e387d687138dc662d96e37
-main: 6aabec1978f9201adf6317e13f1124ee2075aab1
+main: 5ae85f0049d4c45b6b079a8b0751274f7581f445
 release/v124: da250bed9e19c4978d4400d6d404cb312e33636e
 release/v125: a3e1e0773a00009e08d95726fd518ab642255ccd
 release/v126: 6f305409b4af68e8404401a2caad8cb0da9a0494
diff --git a/experimenter/experimenter/features/manifests/ios/.ref-cache.yaml b/experimenter/experimenter/features/manifests/ios/.ref-cache.yaml
index cdff488ea6..4e857230b1 100644
--- a/experimenter/experimenter/features/manifests/ios/.ref-cache.yaml
+++ b/experimenter/experimenter/features/manifests/ios/.ref-cache.yaml
@@ -56,7 +56,7 @@ firefox-v140.2: e06518a809c6c98bf70147de1be100f597998473
 firefox-v140.3: b97fc73ef2df468c2c020013a2a7369f6e3fbb68
 firefox-v141.0: bc01aac74d614b21cad10df0ca574b9c308cad6d
 firefox-v141.1: 417533fb96c0fdda08ff2b300baaa507c2c02551
-main: 6aabec1978f9201adf6317e13f1124ee2075aab1
+main: 5ae85f0049d4c45b6b079a8b0751274f7581f445
 release/v117: 43b690c450066d4dde1b2ccb93ed3714d244d502
 release/v118: 89a7ea3c3372e5a4ef5b3c5b85499d26198d0524
 release/v119: 7dc381f991c6d2a983c3ba7f0cffd880e8c29e7b
diff --git a/experimenter/experimenter/features/manifests/ios/beta.fml.yaml b/experimenter/experimenter/features/manifests/ios/beta.fml.yaml
index 0fa389ba06..71d68844cb 100644
--- a/experimenter/experimenter/features/manifests/ios/beta.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/beta.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean
diff --git a/experimenter/experimenter/features/manifests/ios/developer.fml.yaml b/experimenter/experimenter/features/manifests/ios/developer.fml.yaml
index 6a8549453e..a83f8e2c3e 100644
--- a/experimenter/experimenter/features/manifests/ios/developer.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/developer.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean
diff --git a/experimenter/experimenter/features/manifests/ios/experimenter.yaml b/experimenter/experimenter/features/manifests/ios/experimenter.yaml
index 1daba3f22e..fade47501f 100644
--- a/experimenter/experimenter/features/manifests/ios/experimenter.yaml
+++ b/experimenter/experimenter/features/manifests/ios/experimenter.yaml
@@ -126,6 +126,9 @@ homepage-redesign-feature:
     search-bar:
       type: boolean
       description: "If true, enables the search bar feature on homepage for users.\n"
+    shortcuts-library:
+      type: boolean
+      description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
     stories-redesign:
       type: boolean
       description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
diff --git a/experimenter/experimenter/features/manifests/ios/release.fml.yaml b/experimenter/experimenter/features/manifests/ios/release.fml.yaml
index b739528831..36eb0ea3ef 100644
--- a/experimenter/experimenter/features/manifests/ios/release.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/release.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean
diff --git a/experimenter/experimenter/features/manifests/ios/v142.0.0/beta.fml.yaml b/experimenter/experimenter/features/manifests/ios/v142.0.0/beta.fml.yaml
index 0fa389ba06..71d68844cb 100644
--- a/experimenter/experimenter/features/manifests/ios/v142.0.0/beta.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/v142.0.0/beta.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean
diff --git a/experimenter/experimenter/features/manifests/ios/v142.0.0/developer.fml.yaml b/experimenter/experimenter/features/manifests/ios/v142.0.0/developer.fml.yaml
index 6a8549453e..a83f8e2c3e 100644
--- a/experimenter/experimenter/features/manifests/ios/v142.0.0/developer.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/v142.0.0/developer.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean
diff --git a/experimenter/experimenter/features/manifests/ios/v142.0.0/experimenter.yaml b/experimenter/experimenter/features/manifests/ios/v142.0.0/experimenter.yaml
index 1daba3f22e..fade47501f 100644
--- a/experimenter/experimenter/features/manifests/ios/v142.0.0/experimenter.yaml
+++ b/experimenter/experimenter/features/manifests/ios/v142.0.0/experimenter.yaml
@@ -126,6 +126,9 @@ homepage-redesign-feature:
     search-bar:
       type: boolean
       description: "If true, enables the search bar feature on homepage for users.\n"
+    shortcuts-library:
+      type: boolean
+      description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
     stories-redesign:
       type: boolean
       description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
diff --git a/experimenter/experimenter/features/manifests/ios/v142.0.0/release.fml.yaml b/experimenter/experimenter/features/manifests/ios/v142.0.0/release.fml.yaml
index b739528831..36eb0ea3ef 100644
--- a/experimenter/experimenter/features/manifests/ios/v142.0.0/release.fml.yaml
+++ b/experimenter/experimenter/features/manifests/ios/v142.0.0/release.fml.yaml
@@ -127,6 +127,10 @@ features:
         description: "If true, enables the search bar feature on homepage for users.\n"
         type: Boolean
         default: false
+      shortcuts-library:
+        description: "If true, enables the shortcuts library feature, accessible from the homepage\n"
+        type: Boolean
+        default: false
       stories-redesign:
         description: "If true, enables the stories section redesign on homepage, which also includes the removal of other sections (i.e. jump back in, bookmarks)\n"
         type: Boolean