diff --git a/css/properties/clip-rule.json b/css/properties/clip-rule.json
index 8fe85a67f9de72..125c17cb6a78ab 100644
--- a/css/properties/clip-rule.json
+++ b/css/properties/clip-rule.json
@@ -15,7 +15,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "≤4"
+              "version_added": "3.5"
             },
             "firefox_android": "mirror",
             "ie": {
@@ -51,7 +51,7 @@
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "≤4"
+                "version_added": "3.5"
               },
               "firefox_android": "mirror",
               "ie": {
@@ -88,7 +88,7 @@
               "chrome_android": "mirror",
               "edge": "mirror",
               "firefox": {
-                "version_added": "≤4"
+                "version_added": "3.5"
               },
               "firefox_android": "mirror",
               "ie": {