diff --git a/javascript/builtins/Intl/Segments.json b/javascript/builtins/Intl/Segments.json
index 0ed9228442820c..fcdaaf3ce124d6 100644
--- a/javascript/builtins/Intl/Segments.json
+++ b/javascript/builtins/Intl/Segments.json
@@ -85,7 +85,7 @@
             "__compat": {
               "description": "[Symbol.iterator]",
               "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Intl/Segmenter/segment/Segments/Symbol.iterator",
-              "spec_url": "https://tc39.es/ecma402/#sec-%segmentsprototype%-%symbol.iterator%",
+              "spec_url": "https://tc39.es/ecma402/#sec-%intlsegmentsprototype%-%symbol.iterator%",
               "support": {
                 "chrome": {
                   "version_added": "87"
diff --git a/javascript/builtins/Object.json b/javascript/builtins/Object.json
index ac26ef4c93b93e..fb20946e023640 100644
--- a/javascript/builtins/Object.json
+++ b/javascript/builtins/Object.json
@@ -245,7 +245,7 @@
           "__compat": {
             "description": "<code>__defineGetter__</code>",
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__",
-            "spec_url": "https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-object.prototype.__defineGetter__",
+            "spec_url": "https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__defineGetter__",
             "support": {
               "chrome": {
                 "version_added": "1"
@@ -408,7 +408,7 @@
           "__compat": {
             "description": "<code>__defineSetter__</code>",
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineSetter__",
-            "spec_url": "https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-object.prototype.__defineSetter__",
+            "spec_url": "https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__defineSetter__",
             "support": {
               "chrome": {
                 "version_added": "1"
@@ -1285,7 +1285,7 @@
           "__compat": {
             "description": "<code>__lookupGetter__</code>",
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupGetter__",
-            "spec_url": "https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-object.prototype.__lookupGetter__",
+            "spec_url": "https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__lookupGetter__",
             "support": {
               "chrome": {
                 "version_added": "1"
@@ -1334,7 +1334,7 @@
           "__compat": {
             "description": "<code>__lookupSetter__</code>",
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/__lookupSetter__",
-            "spec_url": "https://tc39.es/ecma262/multipage/additional-ecmascript-features-for-web-browsers.html#sec-object.prototype.__lookupSetter__",
+            "spec_url": "https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-object.prototype.__lookupSetter__",
             "support": {
               "chrome": {
                 "version_added": "1"
diff --git a/javascript/builtins/Set.json b/javascript/builtins/Set.json
index 5e3e7f79a155c6..f8b081d7eeb5fe 100644
--- a/javascript/builtins/Set.json
+++ b/javascript/builtins/Set.json
@@ -550,7 +550,7 @@
         "isDisjointFrom": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Set/isDisjointFrom",
-            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.isDisjointFrom",
+            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.isdisjointfrom",
             "tags": [
               "web-features:set-methods"
             ],
@@ -593,7 +593,7 @@
         "isSubsetOf": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Set/isSubsetOf",
-            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.isSubsetOf",
+            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.issubsetof",
             "tags": [
               "web-features:set-methods"
             ],
@@ -636,7 +636,7 @@
         "isSupersetOf": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Set/isSupersetOf",
-            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.isSupersetOf",
+            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.issupersetof",
             "tags": [
               "web-features:set-methods"
             ],
@@ -817,7 +817,7 @@
         "symmetricDifference": {
           "__compat": {
             "mdn_url": "https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Set/symmetricDifference",
-            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.symmetricDifference",
+            "spec_url": "https://tc39.es/proposal-set-methods/#sec-set.prototype.symmetricdifference",
             "tags": [
               "web-features:set-methods"
             ],
diff --git a/webassembly/api/Tag.json b/webassembly/api/Tag.json
index 63b68742e70c3f..1827249860b9f3 100644
--- a/webassembly/api/Tag.json
+++ b/webassembly/api/Tag.json
@@ -4,7 +4,7 @@
       "Tag": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/WebAssembly/JavaScript_interface/Tag",
-          "spec_url": "https://webassembly.github.io/exception-handling/js-api/#tags",
+          "spec_url": "https://webassembly.github.io/exception-handling/js-api/#tag",
           "support": {
             "chrome": {
               "version_added": "95"
diff --git a/webassembly/mutable-globals.json b/webassembly/mutable-globals.json
index c12c7b1fe0555d..5a9b49109ea3f1 100644
--- a/webassembly/mutable-globals.json
+++ b/webassembly/mutable-globals.json
@@ -2,7 +2,7 @@
   "webassembly": {
     "mutable-globals": {
       "__compat": {
-        "spec_url": "https://webassembly.github.io/spec/js-api/index.html#dom-globaldescriptor-mutable",
+        "spec_url": "https://webassembly.github.io/spec/js-api/#dom-globaldescriptor-mutable",
         "support": {
           "chrome": {
             "version_added": "≤80"