diff --git a/webextensions/browser-compat-data.json b/webextensions/browser-compat-data.json
index ef64d75c244b4..58743af0c4240 100644
--- a/webextensions/browser-compat-data.json
+++ b/webextensions/browser-compat-data.json
@@ -5277,10 +5277,10 @@
         "support": false
       },
       "Firefox": {
-        "support": false
+        "support": "51.0"
       },
       "Firefox for Android": {
-        "support": false
+        "support": "51.0"
       }
     },
     "ExtensionType": {
@@ -5294,10 +5294,10 @@
         "support": false
       },
       "Firefox": {
-        "support": false
+        "support": "51.0"
       },
       "Firefox for Android": {
-        "support": false
+        "support": "51.0"
       }
     },
     "ExtensionInstallType": {
@@ -5311,10 +5311,10 @@
         "support": false
       },
       "Firefox": {
-        "support": false
+        "support": "51.0"
       },
       "Firefox for Android": {
-        "support": false
+        "support": "51.0"
       }
     },
     "ExtensionInfo": {
@@ -5379,10 +5379,10 @@
         "support": false
       },
       "Firefox": {
-        "support": false
+        "support": "51.0"
       },
       "Firefox for Android": {
-        "support": false
+        "support": "51.0"
       }
     },
     "getPermissionWarningsById": {
@@ -5464,10 +5464,10 @@
         "support": false
       },
       "Firefox": {
-        "support": false
+        "support": "51.0"
       },
       "Firefox for Android": {
-        "support": false
+        "support": "51.0"
       }
     },
     "onInstalled": {