diff --git a/webextensions/api/alarms.json b/webextensions/api/alarms.json
index 19c9e7a874bcb2..f9e978ebc24642 100644
--- a/webextensions/api/alarms.json
+++ b/webextensions/api/alarms.json
@@ -90,26 +90,12 @@
               "edge": {
                 "version_added": "79"
               },
-              "firefox": [
-                {
-                  "version_added": "45"
-                },
-                {
-                  "version_added": "45",
-                  "version_removed": "64",
-                  "notes": "Alarms scheduled for a time in the past never fire."
-                }
-              ],
-              "firefox_android": [
-                {
-                  "version_added": "48"
-                },
-                {
-                  "version_added": "48",
-                  "version_removed": "64",
-                  "notes": "Alarms scheduled for a time in the past never fire."
-                }
-              ],
+              "firefox": {
+                "version_added": "45"
+              },
+              "firefox_android": {
+                "version_added": "48"
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": "14"
diff --git a/webextensions/api/clipboard.json b/webextensions/api/clipboard.json
index e224e8778c7c51..28df6880764e53 100644
--- a/webextensions/api/clipboard.json
+++ b/webextensions/api/clipboard.json
@@ -13,7 +13,10 @@
               "firefox": {
                 "version_added": "57"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "notes": "Method is defined but always rejects with an error."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
diff --git a/webextensions/api/commands.json b/webextensions/api/commands.json
index 483981912c901b..0caf696bbba546 100644
--- a/webextensions/api/commands.json
+++ b/webextensions/api/commands.json
@@ -59,7 +59,9 @@
                   "version_added": false,
                   "impl_url": "https://bugzil.la/1843866"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -177,7 +179,9 @@
                   "version_added": false,
                   "impl_url": "https://bugzil.la/1843866"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
diff --git a/webextensions/api/contextualIdentities.json b/webextensions/api/contextualIdentities.json
index aaa2847d5a071a..2495ecd3dbfcbc 100644
--- a/webextensions/api/contextualIdentities.json
+++ b/webextensions/api/contextualIdentities.json
@@ -13,7 +13,11 @@
                 "firefox": {
                   "version_added": "53"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -32,7 +36,11 @@
                 "firefox": {
                   "version_added": "53"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -51,7 +59,11 @@
                 "firefox": {
                   "version_added": "57"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -70,7 +82,11 @@
                 "firefox": {
                   "version_added": "53"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -89,7 +105,11 @@
                 "firefox": {
                   "version_added": "57"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -108,7 +128,11 @@
                 "firefox": {
                   "version_added": "53"
                 },
-                "firefox_android": "mirror",
+                "firefox_android": {
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1638878",
+                  "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+                },
                 "opera": "mirror",
                 "safari": {
                   "version_added": false
@@ -130,7 +154,11 @@
                 "version_added": "53",
                 "notes": "Before version 57, this method resolves its promise with <code>false</code> if the contextual identities feature is disabled."
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -154,7 +182,11 @@
                   "Before version 57, this method resolves its promise with <code>null</code> if the given identity was not found."
                 ]
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -174,7 +206,11 @@
               "firefox": {
                 "version_added": "57"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -194,7 +230,11 @@
               "firefox": {
                 "version_added": "57"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -214,7 +254,11 @@
               "firefox": {
                 "version_added": "57"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -234,7 +278,11 @@
               "firefox": {
                 "version_added": "123"
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -255,7 +303,11 @@
                 "version_added": "53",
                 "notes": "Before version 57, this method resolves its promise with <code>false</code> if the contextual identities feature is disabled."
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -279,7 +331,11 @@
                   "Before version 57, this method resolves its promise with <code>null</code> if the given identity was not found."
                 ]
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
@@ -303,7 +359,11 @@
                   "Before version 57, this method resolves its promise with <code>null</code> if the given identity was not found."
                 ]
               },
-              "firefox_android": "mirror",
+              "firefox_android": {
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1638878",
+                "notes": "<code>contextualIdentities</code> is defined but not functional in Firefox for Android."
+              },
               "opera": "mirror",
               "safari": {
                 "version_added": false
diff --git a/webextensions/api/cookies.json b/webextensions/api/cookies.json
index e6b0ea87d6d0f8..0ce78226fc50fb 100644
--- a/webextensions/api/cookies.json
+++ b/webextensions/api/cookies.json
@@ -48,7 +48,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -248,7 +248,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -322,7 +322,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -390,7 +390,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -454,7 +454,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
@@ -629,7 +629,7 @@
             "__compat": {
               "support": {
                 "chrome": {
-                  "version_added": false
+                  "version_added": "119"
                 },
                 "edge": "mirror",
                 "firefox": {
diff --git a/webextensions/api/dns.json b/webextensions/api/dns.json
index 169a76a2bdc8ab..0e5cd908a61c1e 100644
--- a/webextensions/api/dns.json
+++ b/webextensions/api/dns.json
@@ -2,12 +2,32 @@
   "webextensions": {
     "api": {
       "dns": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/dns",
+          "support": {
+            "chrome": {
+              "version_added": "preview",
+              "notes": "The required <code>dns</code> permission is only supported in Chrome Dev."
+            },
+            "edge": "mirror",
+            "firefox": {
+              "version_added": "60"
+            },
+            "firefox_android": "mirror",
+            "opera": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror"
+          }
+        },
         "resolve": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/dns/resolve",
             "support": {
               "chrome": {
-                "version_added": "18"
+                "version_added": "preview",
+                "notes": "The required <code>dns</code> permission is only supported in Chrome Dev."
               },
               "edge": "mirror",
               "firefox": {
diff --git a/webextensions/api/dom.json b/webextensions/api/dom.json
index 5338f46097eae6..9dea5510c83d69 100644
--- a/webextensions/api/dom.json
+++ b/webextensions/api/dom.json
@@ -2,6 +2,24 @@
   "webextensions": {
     "api": {
       "dom": {
+        "__compat": {
+          "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/dom",
+          "support": {
+            "chrome": {
+              "version_added": "88"
+            },
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "opera": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror"
+          }
+        },
         "openOrClosedShadowRoot": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/dom/openOrClosedShadowRoot",
diff --git a/webextensions/api/events.json b/webextensions/api/events.json
index 4ddc7b06dbb16a..fe949bc063bdc0 100644
--- a/webextensions/api/events.json
+++ b/webextensions/api/events.json
@@ -13,7 +13,7 @@
                 "version_added": "14"
               },
               "firefox": {
-                "version_added": false
+                "version_added": true
               },
               "firefox_android": "mirror",
               "opera": "mirror",
@@ -27,7 +27,6 @@
           },
           "addListener": {
             "__compat": {
-              "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/events/Event/addListener",
               "support": {
                 "chrome": {
                   "version_added": true
@@ -36,7 +35,7 @@
                   "version_added": "14"
                 },
                 "firefox": {
-                  "version_added": false
+                  "version_added": true
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",
@@ -101,7 +100,7 @@
                   "version_added": "14"
                 },
                 "firefox": {
-                  "version_added": false
+                  "version_added": true
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",
@@ -145,7 +144,7 @@
                   "version_added": "14"
                 },
                 "firefox": {
-                  "version_added": false
+                  "version_added": true
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",
diff --git a/webextensions/api/proxy.json b/webextensions/api/proxy.json
index 2e22c37a11ee84..af14bf1558d79a 100644
--- a/webextensions/api/proxy.json
+++ b/webextensions/api/proxy.json
@@ -400,7 +400,9 @@
                 "notes": "From version 88, the <code>ftp</code> setting has no effect because FTP is no longer supported (see <a href='https://bugzil.la/1626365'>bug 1626365</a>)."
               },
               "firefox_android": {
-                "version_added": false
+                "version_added": false,
+                "impl_url": "https://bugzil.la/1725981",
+                "notes": "The object is defined but any attempt to read or modify the setting throws an exception."
               },
               "opera": "mirror",
               "safari": {
diff --git a/webextensions/api/runtime.json b/webextensions/api/runtime.json
index a95598f0389e38..3d2986bd64cc19 100644
--- a/webextensions/api/runtime.json
+++ b/webextensions/api/runtime.json
@@ -119,7 +119,8 @@
                 },
                 "edge": "mirror",
                 "firefox": {
-                  "version_added": false
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1787379"
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",
diff --git a/webextensions/api/scripting.json b/webextensions/api/scripting.json
index 60a11b0f9ddfe6..cfee97ba77be7e 100644
--- a/webextensions/api/scripting.json
+++ b/webextensions/api/scripting.json
@@ -67,7 +67,8 @@
                 },
                 "edge": "mirror",
                 "firefox": {
-                  "version_added": false
+                  "version_added": false,
+                  "impl_url": "https://bugzil.la/1736575"
                 },
                 "firefox_android": "mirror",
                 "opera": "mirror",
diff --git a/webextensions/api/tabs.json b/webextensions/api/tabs.json
index c82a2240bdb18f..34a5f5abf533ca 100644
--- a/webextensions/api/tabs.json
+++ b/webextensions/api/tabs.json
@@ -1781,7 +1781,7 @@
                 "version_added": "45"
               },
               "firefox_android": {
-                "version_added": false
+                "version_added": "118"
               },
               "opera": "mirror",
               "safari": {
diff --git a/webextensions/manifest/action.json b/webextensions/manifest/action.json
index c4937ab9b20558..79cdab9c18be6c 100644
--- a/webextensions/manifest/action.json
+++ b/webextensions/manifest/action.json
@@ -47,7 +47,7 @@
           "__compat": {
             "support": {
               "chrome": {
-                "version_added": "88"
+                "version_added": false
               },
               "edge": "mirror",
               "firefox": {
@@ -82,9 +82,7 @@
               "firefox": {
                 "version_added": "109"
               },
-              "firefox_android": {
-                "version_added": false
-              },
+              "firefox_android": "mirror",
               "opera": "mirror",
               "safari": {
                 "version_added": "15.4",
diff --git a/webextensions/manifest/background.json b/webextensions/manifest/background.json
index d6cafd22a6c555..64c9f931c167c8 100644
--- a/webextensions/manifest/background.json
+++ b/webextensions/manifest/background.json
@@ -67,6 +67,7 @@
               "firefox": {
                 "version_added": "48",
                 "notes": [
+                  "Available for use in Manifest V2 only.",
                   "From Firefox 106, persistent and non-persistent pages are supported for Manifest V2.",
                   "To Firefox 105, only persistent pages are supported.",
                   "Before version 66, Firefox would log a warning even if the value was set to <code>true</code>."
@@ -77,7 +78,7 @@
               "safari": [
                 {
                   "version_added": "14.1",
-                  "notes": "Since Safari 15.4, ignored if <code>service_worker</code> is used."
+                  "notes": "Non-persistent pages are supported, through <code>persistent: false</code>."
                 },
                 {
                   "version_added": "14",
diff --git a/webextensions/manifest/browser_action.json b/webextensions/manifest/browser_action.json
index 861ac79ed8209a..89cb5cc7be975d 100644
--- a/webextensions/manifest/browser_action.json
+++ b/webextensions/manifest/browser_action.json
@@ -102,7 +102,7 @@
                 "version_added": "48"
               },
               "firefox_android": {
-                "version_added": false
+                "version_added": "79"
               },
               "opera": "mirror",
               "safari": {
diff --git a/webextensions/manifest/commands.json b/webextensions/manifest/commands.json
index ac979946d68364..5e4c25a9d39f48 100644
--- a/webextensions/manifest/commands.json
+++ b/webextensions/manifest/commands.json
@@ -206,6 +206,70 @@
             }
           }
         },
+        "_execute_action": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": "88"
+              },
+              "edge": "mirror",
+              "firefox": {
+                "version_added": true
+              },
+              "firefox_android": {
+                "version_added": false
+              },
+              "opera": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror"
+            }
+          }
+        },
+        "_execute_browser_action": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": true
+              },
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "52"
+              },
+              "firefox_android": {
+                "version_added": false
+              },
+              "opera": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror"
+            }
+          }
+        },
+        "_execute_page_action": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": true,
+                "notes": "Available for use in Manifest V2 only."
+              },
+              "edge": "mirror",
+              "firefox": {
+                "version_added": "48"
+              },
+              "firefox_android": {
+                "version_added": false
+              },
+              "opera": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror"
+            }
+          }
+        },
         "_execute_sidebar_action": {
           "__compat": {
             "support": {
diff --git a/webextensions/manifest/content_scripts.json b/webextensions/manifest/content_scripts.json
index 1ec74965699151..6c2ecd215dbfa8 100644
--- a/webextensions/manifest/content_scripts.json
+++ b/webextensions/manifest/content_scripts.json
@@ -183,6 +183,25 @@
             }
           }
         },
+        "match_origin_as_fallback": {
+          "__compat": {
+            "support": {
+              "chrome": {
+                "version_added": "99"
+              },
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "opera": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror"
+            }
+          }
+        },
         "matches": {
           "__compat": {
             "support": {
diff --git a/webextensions/manifest/content_security_policy.json b/webextensions/manifest/content_security_policy.json
index 8a1d34d9e9f675..66a77d654178e4 100644
--- a/webextensions/manifest/content_security_policy.json
+++ b/webextensions/manifest/content_security_policy.json
@@ -58,26 +58,6 @@
             }
           }
         },
-        "isolated_world": {
-          "__compat": {
-            "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/content_security_policy#isolated_world",
-            "support": {
-              "chrome": {
-                "version_added": "88"
-              },
-              "edge": "mirror",
-              "firefox": {
-                "version_added": false
-              },
-              "firefox_android": "mirror",
-              "opera": "mirror",
-              "safari": {
-                "version_added": false
-              },
-              "safari_ios": "mirror"
-            }
-          }
-        },
         "sandbox": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/manifest.json/content_security_policy#sandbox",
diff --git a/webextensions/manifest/permissions.json b/webextensions/manifest/permissions.json
index eec9c86997dae5..327cb8d59bf828 100644
--- a/webextensions/manifest/permissions.json
+++ b/webextensions/manifest/permissions.json
@@ -440,7 +440,8 @@
             "description": "<code>dns</code>",
             "support": {
               "chrome": {
-                "version_added": false
+                "version_added": "preview",
+                "notes": "The <code>dns</code> API is only available in Chrome Dev."
               },
               "edge": "mirror",
               "firefox": {