diff --git a/api/Navigator.json b/api/Navigator.json
index cfa85a26fd7c96..a1c11fb104ac94 100644
--- a/api/Navigator.json
+++ b/api/Navigator.json
@@ -1404,10 +1404,12 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "preview",
-              "notes": "Opt-in to GPC by setting the preference <code>privacy.globalprivacycontrol.enabled</code> to <code>true</code>."
+              "version_added": "120",
+              "notes": "Opt-in to GPC using the Website Privacy Preference setting (<code>about:preferences#privacy</code>) checkbox 'Tell websites not to sell or share my data', or by setting the preference <code>privacy.globalprivacycontrol.enabled</code> to <code>true</code>."
+            },
+            "firefox_android": {
+              "version_added": false
             },
-            "firefox_android": "mirror",
             "ie": {
               "version_added": false
             },
@@ -4357,7 +4359,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": false
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/api/PublicKeyCredential.json b/api/PublicKeyCredential.json
index 843d5c1526e0bb..8210af801510b4 100644
--- a/api/PublicKeyCredential.json
+++ b/api/PublicKeyCredential.json
@@ -60,7 +60,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": false
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/api/ToggleEvent.json b/api/ToggleEvent.json
index 047c71c5e8f094..3329c809cda92a 100644
--- a/api/ToggleEvent.json
+++ b/api/ToggleEvent.json
@@ -11,14 +11,7 @@
           "chrome_android": "mirror",
           "edge": "mirror",
           "firefox": {
-            "version_added": "114",
-            "flags": [
-              {
-                "type": "preference",
-                "name": "dom.element.popover.enabled",
-                "value_to_set": "true"
-              }
-            ]
+            "version_added": "120"
           },
           "firefox_android": "mirror",
           "ie": {
@@ -52,14 +45,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "114",
-              "flags": [
-                {
-                  "type": "preference",
-                  "name": "dom.element.popover.enabled",
-                  "value_to_set": "true"
-                }
-              ]
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
@@ -93,14 +79,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "114",
-              "flags": [
-                {
-                  "type": "preference",
-                  "name": "dom.element.popover.enabled",
-                  "value_to_set": "true"
-                }
-              ]
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
@@ -134,14 +113,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "114",
-              "flags": [
-                {
-                  "type": "preference",
-                  "name": "dom.element.popover.enabled",
-                  "value_to_set": "true"
-                }
-              ]
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/api/UserActivation.json b/api/UserActivation.json
index a029b9fa13c575..9d2648428612e2 100644
--- a/api/UserActivation.json
+++ b/api/UserActivation.json
@@ -11,7 +11,7 @@
           "chrome_android": "mirror",
           "edge": "mirror",
           "firefox": {
-            "version_added": false
+            "version_added": "120"
           },
           "firefox_android": "mirror",
           "ie": {
@@ -44,7 +44,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": false
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
@@ -78,7 +78,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": false
+              "version_added": "120"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/api/WorkerNavigator.json b/api/WorkerNavigator.json
index 3ace3c27e3becc..48bfcf3bfd832f 100644
--- a/api/WorkerNavigator.json
+++ b/api/WorkerNavigator.json
@@ -257,10 +257,12 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "preview",
+              "version_added": "120",
               "notes": "Opt-in to GPC by setting the preference <code>privacy.globalprivacycontrol.enabled</code> to <code>true</code>."
             },
-            "firefox_android": "mirror",
+            "firefox_android": {
+              "version_added": false
+            },
             "ie": {
               "version_added": false
             },
diff --git a/css/properties/background-image.json b/css/properties/background-image.json
index 8a1aa1165483c0..d01db579d167d3 100644
--- a/css/properties/background-image.json
+++ b/css/properties/background-image.json
@@ -135,7 +135,8 @@
               "edge": "mirror",
               "firefox": {
                 "prefix": "-moz-",
-                "version_added": "4"
+                "version_added": "4",
+                "version_removed": "120"
               },
               "firefox_android": "mirror",
               "ie": {
diff --git a/css/types/-moz-image-rect.json b/css/types/-moz-image-rect.json
index c2b45a9911acde..815d45e8770309 100644
--- a/css/types/-moz-image-rect.json
+++ b/css/types/-moz-image-rect.json
@@ -12,7 +12,8 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "4"
+              "version_added": "4",
+              "version_removed": "120"
             },
             "firefox_android": "mirror",
             "ie": {
diff --git a/css/types/image.json b/css/types/image.json
index 1c9f9be1f2fd65..5996a152a2ef67 100644
--- a/css/types/image.json
+++ b/css/types/image.json
@@ -1768,14 +1768,10 @@
               "edge": "mirror",
               "firefox": {
                 "version_added": false,
-                "notes": [
-                  "See <a href='https://bugzil.la/703217'>bug 703217</a>.",
-                  "The <a href='https://developer.mozilla.org/docs/Web/CSS/-moz-image-rect'><code>-moz-image-rect()</code></a> function supports fragments as of Firefox 4."
-                ]
+                "notes": "See <a href='https://bugzil.la/703217'>bug 703217</a>."
               },
               "firefox_android": {
-                "version_added": false,
-                "notes": "The <a href='https://developer.mozilla.org/docs/Web/CSS/-moz-image-rect'><code>-moz-image-rect()</code></a> function supports fragments as of Firefox 4."
+                "version_added": false
               },
               "ie": {
                 "version_added": false
diff --git a/http/headers/Sec-GPC.json b/http/headers/Sec-GPC.json
index 6bba7cfe04a9b1..46a4a8ddf35d94 100644
--- a/http/headers/Sec-GPC.json
+++ b/http/headers/Sec-GPC.json
@@ -11,17 +11,12 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "preview",
-              "flags": [
-                {
-                  "type": "preference",
-                  "name": "privacy.globalprivacycontrol.enabled",
-                  "value_to_set": "true"
-                }
-              ],
+              "version_added": "120",
               "notes": "Opt-in to GPC by setting the preference <code>privacy.globalprivacycontrol.enabled</code> to <code>true</code>."
             },
-            "firefox_android": "mirror",
+            "firefox_android": {
+              "version_added": false
+            },
             "ie": {
               "version_added": false
             },
diff --git a/http/status.json b/http/status.json
index 8b9f6aa958ec19..2a29c953e43916 100644
--- a/http/status.json
+++ b/http/status.json
@@ -46,26 +46,12 @@
           ],
           "support": {
             "chrome": {
-              "version_added": "103",
-              "notes": "Supported in <a href='https://developer.chrome.com/blog/early-hints/'>HTTP/2 and later for preconnect and preload</a>."
+              "version_added": "103"
             },
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "102",
-              "flags": [
-                {
-                  "type": "preference",
-                  "name": "network.early-hints.enabled",
-                  "value_to_set": "true"
-                },
-                {
-                  "type": "preference",
-                  "name": "network.early-hints.preconnect.enabled",
-                  "value_to_set": "true"
-                }
-              ],
-              "notes": "Supported in HTTP1.0 and later for preconnect."
+              "version_added": "120"
             },
             "ie": {
               "version_added": false
@@ -73,8 +59,7 @@
             "oculus": "mirror",
             "opera": "mirror",
             "safari": {
-              "version_added": "17",
-              "notes": "Supported in HTTP/2 and later for preconnect."
+              "version_added": "17"
             }
           },
           "status": {
@@ -82,6 +67,70 @@
             "standard_track": true,
             "deprecated": false
           }
+        },
+        "preconnect": {
+          "__compat": {
+            "description": "<code>rel=preconnect</code>",
+            "support": {
+              "chrome": {
+                "version_added": "103"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "120"
+              },
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "safari": {
+                "version_added": "17",
+                "notes": "Supported in HTTP/2 and later only."
+              }
+            },
+            "status": {
+              "experimental": false,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
+        "preload": {
+          "__compat": {
+            "description": "<code>rel=preload</code>",
+            "support": {
+              "chrome": {
+                "version_added": "103"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "102",
+                "flags": [
+                  {
+                    "type": "preference",
+                    "name": "network.early-hints.enabled",
+                    "value_to_set": "true"
+                  }
+                ]
+              },
+              "ie": {
+                "version_added": false
+              },
+              "oculus": "mirror",
+              "opera": "mirror",
+              "safari": {
+                "version_added": false
+              }
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
         }
       },
       "200": {