diff --git a/features/error-cause.yml b/features/error-cause.yml
index 69e25634134..685de80784c 100644
--- a/features/error-cause.yml
+++ b/features/error-cause.yml
@@ -1,7 +1,6 @@
 name: Error cause
 description: The `cause` property of errors records the specific original cause of the error, particularly for errors that have been re-thrown.
-spec:
-  - https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-installerrorcause
+spec: https://tc39.es/ecma262/multipage/fundamental-objects.html#sec-installerrorcause
 compat_features:
   - javascript.builtins.Error.Error.options_cause_parameter
   - javascript.builtins.Error.cause
diff --git a/features/focus-events.yml b/features/focus-events.yml
index 7108fd9f1d0..cf9b9e17399 100644
--- a/features/focus-events.yml
+++ b/features/focus-events.yml
@@ -1,9 +1,10 @@
 name: Focus events
 description: Focus events, such as `focus` and `blur`, fire when an element gets or loses focus.
 spec: https://w3c.github.io/uievents/#events-focusevent
-compute_from:
-  - api.Element.blur_event
-  - api.Element.focus_event
+status:
+  compute_from:
+    - api.Element.blur_event
+    - api.Element.focus_event
 # It's possible that caniuse's `focusin-focusout-events` could be linked here
 # or broken out into a separate feature. But caniuse and BCD conflict,
 # making this difficult. See this issue to help resolve this:
diff --git a/features/focus-events.yml.dist b/features/focus-events.yml.dist
index 465ed030f69..602353b94aa 100644
--- a/features/focus-events.yml.dist
+++ b/features/focus-events.yml.dist
@@ -2,10 +2,17 @@
 # Do not edit this file by hand. Edit the source file instead!
 
 status:
-  baseline: false
+  baseline: high
+  baseline_low_date: 2015-07-29
+  baseline_high_date: 2018-01-29
   support:
-    safari: "7"
-    safari_ios: "7"
+    chrome: "1"
+    chrome_android: "18"
+    edge: "12"
+    firefox: "24"
+    firefox_android: "24"
+    safari: "3.1"
+    safari_ios: "2"
 compat_features:
   # baseline: high
   # baseline_low_date: 2015-07-29
@@ -20,6 +27,7 @@ compat_features:
   #   safari_ios: "2"
   - api.Element.blur_event
 
+  # ⬇️ Same status as overall feature ⬇️
   # baseline: high
   # baseline_low_date: 2015-07-29
   # baseline_high_date: 2018-01-29
diff --git a/features/uint8array-base64-hex.yml b/features/uint8array-base64-hex.yml
index 293fe95d212..b96e45d8aaf 100644
--- a/features/uint8array-base64-hex.yml
+++ b/features/uint8array-base64-hex.yml
@@ -1,8 +1,7 @@
 name: Uint8Array base64 and hex conversion
 description: The `Uint8Array` object methods `fromBase64()`, `toBase64()`, and `setFromBase64()` convert to and from base64 strings. The `fromHex()`, `toHex()`, and `setFromHex()` methods convert to and from hex strings.
 spec: https://tc39.es/proposal-arraybuffer-base64/spec/
-group:
-  - typed-arrays
+group: typed-arrays
 compat_features:
   - javascript.builtins.Uint8Array.fromBase64
   - javascript.builtins.Uint8Array.fromHex
diff --git a/features/weak-references.yml b/features/weak-references.yml
index dba1193752e..55060f0e20a 100644
--- a/features/weak-references.yml
+++ b/features/weak-references.yml
@@ -1,7 +1,6 @@
 name: Weak references
 description: The `WeakRef` and `FinalizationRegistry` objects hold references to garbage-collectable objects without creating strong references that prevent their garbage collection.
-spec:
-  - https://tc39.es/ecma262/multipage/managing-memory.html#sec-managing-memory
+spec: https://tc39.es/ecma262/multipage/managing-memory.html#sec-managing-memory
 snapshot: ecmascript-2021
 group: javascript
 status:
diff --git a/package-lock.json b/package-lock.json
index ec65ab4e42d..bfa5d62e399 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,6 @@
         "@types/diff": "^5.2.3",
         "@types/node": "^18.19.68",
         "ajv": "^8.17.1",
-        "ajv-formats": "^3.0.1",
         "caniuse-lite": "^1.0.30001689",
         "diff": "^7.0.0",
         "eslint-plugin-new-with-error": "^5.0.0",
@@ -1158,22 +1157,6 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
-    "node_modules/ajv-formats": {
-      "version": "3.0.1",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ajv": "^8.0.0"
-      },
-      "peerDependencies": {
-        "ajv": "^8.0.0"
-      },
-      "peerDependenciesMeta": {
-        "ajv": {
-          "optional": true
-        }
-      }
-    },
     "node_modules/ansi-colors": {
       "version": "4.1.3",
       "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.3.tgz",
diff --git a/package.json b/package.json
index c609b0df5c9..0acd39aa5a1 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,6 @@
     "@types/diff": "^5.2.3",
     "@types/node": "^18.19.68",
     "ajv": "^8.17.1",
-    "ajv-formats": "^3.0.1",
     "caniuse-lite": "^1.0.30001689",
     "diff": "^7.0.0",
     "eslint-plugin-new-with-error": "^5.0.0",
diff --git a/schemas/data.schema.json b/schemas/data.schema.json
index 99363c4d78a..8e81681c9b9 100644
--- a/schemas/data.schema.json
+++ b/schemas/data.schema.json
@@ -40,7 +40,7 @@
               "type": "array"
             }
           ],
-          "description": "caniuse.com identifier"
+          "description": "caniuse.com identifier(s)"
         },
         "compat_features": {
           "description": "Sources of support data for this feature",
@@ -70,7 +70,7 @@
               "type": "array"
             }
           ],
-          "description": "Group identifier"
+          "description": "Group identifier(s)"
         },
         "name": {
           "description": "Short name",
@@ -89,26 +89,22 @@
               "type": "array"
             }
           ],
-          "description": "Snapshot identifier"
+          "description": "Snapshot identifier(s)"
         },
         "spec": {
           "anyOf": [
             {
-              "description": "Specification URL",
-              "format": "uri",
               "type": "string"
             },
             {
               "items": {
-                "description": "Specification URL",
-                "format": "uri",
                 "type": "string"
               },
               "minItems": 2,
               "type": "array"
             }
           ],
-          "description": "Specification"
+          "description": "Specification URL(s)"
         },
         "status": {
           "additionalProperties": false,
@@ -286,7 +282,6 @@
         },
         "spec": {
           "description": "Specification",
-          "format": "uri",
           "type": "string"
         }
       },
diff --git a/scripts/build.ts b/scripts/build.ts
index af131761952..35f346481ce 100644
--- a/scripts/build.ts
+++ b/scripts/build.ts
@@ -88,7 +88,7 @@ function valid(data: any): boolean {
   if (!valid) {
     // TODO: turn on strictNullChecks, fix all the errors, and replace this with:
     // const errors = validate.errors;
-    const errors = (valid as any).errors as DefinedError[];
+    const errors = validate.errors as DefinedError[];
     for (const error of errors) {
       logger.error(`${error.instancePath}: ${error.message}`);
     }
diff --git a/scripts/validate.ts b/scripts/validate.ts
index 9a21ca7fdf3..8c88eecfef1 100644
--- a/scripts/validate.ts
+++ b/scripts/validate.ts
@@ -1,21 +1,17 @@
 import Ajv from "ajv";
-import addFormats from "ajv-formats";
 import assert from "node:assert/strict";
 
 import * as schema from "../schemas/data.schema.json" with { type: "json" };
 
-export function validate(data: any) {
-  const ajv = new Ajv({ allErrors: true, allowUnionTypes: true });
-  addFormats(ajv);
-  // TODO: turn on strictNullChecks, fix all the errors, and replace this with:
-  // const validator = ajv.compile<WebFeaturesData>(schema);
-  const validator = ajv.compile(schema);
+const ajv = new Ajv({ allErrors: true, allowUnionTypes: true });
+// TODO: turn on strictNullChecks, fix all the errors, and replace this with:
+// const validator = ajv.compile<WebFeaturesData>(schema);
+const validator = ajv.compile(schema);
 
-  assert.equal(
-    validator({}),
-    false,
-    "Failed confidence check: schema validates empty object",
-  );
+assert.equal(
+  validator({}),
+  false,
+  "Failed confidence check: schema validates empty object",
+);
 
-  return validator;
-}
+export { validator as validate };
diff --git a/types.ts b/types.ts
index 6d51e26b912..b99adb54beb 100644
--- a/types.ts
+++ b/types.ts
@@ -33,13 +33,13 @@ export interface FeatureData {
     description: string;
     /** Short description of the feature, as an HTML string */
     description_html: string;
-    /** Specification */
-    spec: specification_url | [specification_url, specification_url, ...specification_url[]];
-    /** Group identifier */
+    /** Specification URL(s) */
+    spec: string | [string, string, ...string[]];
+    /** Group identifier(s) */
     group?: string | [string, string, ...string[]];
-    /** Snapshot identifier */
+    /** Snapshot identifier(s) */
     snapshot?: string | [string, string, ...string[]];
-    /** caniuse.com identifier */
+    /** caniuse.com identifier(s) */
     caniuse?: string | [string, string, ...string[]];
     /** Whether a feature is considered a "baseline" web platform feature and when it achieved that status */
     status: SupportStatus;
@@ -69,11 +69,6 @@ interface SupportStatus extends Status {
     by_compat_key?: Record<string, Status>
 }
 
-/** Specification URL
- * @format uri
-*/
-type specification_url = string;
-
 export interface GroupData {
     /** Short name */
     name: string;
@@ -85,5 +80,5 @@ export interface SnapshotData {
     /** Short name */
     name: string;
     /** Specification */
-    spec: specification_url;
+    spec: string;
 }