diff --git a/api/SpeechRecognitionAlternative.json b/api/SpeechRecognitionAlternative.json
index 38e57da2fab79d..7b7a3c73c48927 100644
--- a/api/SpeechRecognitionAlternative.json
+++ b/api/SpeechRecognitionAlternative.json
@@ -5,17 +5,14 @@
         "mdn_url": "https://developer.mozilla.org/docs/Web/API/SpeechRecognitionAlternative",
         "support": {
           "chrome": {
-            "prefix": "webkit",
             "version_added": "33",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "chrome_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "edge": {
-            "prefix": "webkit",
             "version_added": "≤79",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
@@ -41,12 +38,10 @@
             "version_added": false
           },
           "samsunginternet_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "webview_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           }
diff --git a/api/SpeechRecognitionResult.json b/api/SpeechRecognitionResult.json
index de80ce97bc9c47..3b029357451724 100644
--- a/api/SpeechRecognitionResult.json
+++ b/api/SpeechRecognitionResult.json
@@ -5,17 +5,14 @@
         "mdn_url": "https://developer.mozilla.org/docs/Web/API/SpeechRecognitionResult",
         "support": {
           "chrome": {
-            "prefix": "webkit",
             "version_added": "33",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "chrome_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "edge": {
-            "prefix": "webkit",
             "version_added": "≤79",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
@@ -41,12 +38,10 @@
             "version_added": false
           },
           "samsunginternet_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "webview_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           }
diff --git a/api/SpeechRecognitionResultList.json b/api/SpeechRecognitionResultList.json
index db626a6da5e598..4bc7b79feb2933 100644
--- a/api/SpeechRecognitionResultList.json
+++ b/api/SpeechRecognitionResultList.json
@@ -5,17 +5,14 @@
         "mdn_url": "https://developer.mozilla.org/docs/Web/API/SpeechRecognitionResultList",
         "support": {
           "chrome": {
-            "prefix": "webkit",
             "version_added": "33",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "chrome_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "edge": {
-            "prefix": "webkit",
             "version_added": "≤79",
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
@@ -41,12 +38,10 @@
             "version_added": false
           },
           "samsunginternet_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           },
           "webview_android": {
-            "prefix": "webkit",
             "version_added": true,
             "notes": "You'll need to serve your code through a web server for recognition to work."
           }