diff --git a/BREAKING.md b/BREAKING.md
index 2f39c08d165..c8c6ff691e7 100644
--- a/BREAKING.md
+++ b/BREAKING.md
@@ -52,7 +52,7 @@ This section details the desktop browser, JavaScript framework, and mobile platf
 | --------------- | ----------------- |
 | Chrome          | 79+               |
 | Safari          | 14+               |
-| Firefox         | 63+               |
+| Firefox         | 70+               |
 | Edge            | 79+               |
 
 **Minimum JavaScript Framework Versions**
diff --git a/core/package.json b/core/package.json
index 3788bab7d54..84007617ad1 100644
--- a/core/package.json
+++ b/core/package.json
@@ -71,12 +71,11 @@
     "typescript": "^4.0.5"
   },
   "scripts": {
-    "build": "npm run clean && npm run build.css && stencil build --es5 --docs-json dist/docs.json && npm run cdnloader",
+    "build": "npm run clean && npm run build.css && stencil build --es5 --docs-json dist/docs.json",
     "build.css": "npm run css.sass && npm run css.minify",
     "build.debug": "npm run clean && stencil build --debug",
     "build.docs.json": "stencil build --docs-json dist/docs.json",
     "clean": "node scripts/clean.js",
-    "cdnloader": "node scripts/copy-cdn-loader.js",
     "css.minify": "cleancss -O2 -o ./css/ionic.bundle.css ./css/ionic.bundle.css",
     "css.sass": "sass --embed-sources src/css:./css",
     "eslint": "eslint src",
diff --git a/core/scripts/cdn-loader.js b/core/scripts/cdn-loader.js
deleted file mode 100644
index d02280a4625..00000000000
--- a/core/scripts/cdn-loader.js
+++ /dev/null
@@ -1,30 +0,0 @@
-
-exports.applyPolyfills = function() { return Promise.resolve() };
-
-exports.defineCustomElements = function(_, opts) {
-  return new Promise(function(resolve, reject) {
-    if (typeof document !== 'undefined') {
-      opts = opts || {};
-      var mod = document.createElement('script');
-      mod.setAttribute('type', 'module');
-      mod['data-opts'] = opts;
-      mod.src = '__CDN_LOADER_URL__/dist/ionic/ionic.esm.js';
-
-      var legacy = document.createElement('script');
-      legacy.setAttribute('nomodule', '');
-      legacy['data-opts'] = opts;
-      legacy.src = '__CDN_LOADER_URL__/dist/ionic/ionic.js';
-
-      mod.onload = resolve;
-      mod.onerror = reject;
-
-      legacy.onload = resolve;
-      legacy.onerror = reject;
-
-      document.head.appendChild(mod);
-      document.head.appendChild(legacy);
-    } else {
-      resolve();
-    }
-  });
-}
diff --git a/core/scripts/copy-cdn-loader.js b/core/scripts/copy-cdn-loader.js
deleted file mode 100644
index 2f0cbe9d06d..00000000000
--- a/core/scripts/copy-cdn-loader.js
+++ /dev/null
@@ -1,28 +0,0 @@
-
-// the unpkg link cannot use "latest" in the url
-// so this script is to keep the link updated
-// with the latest
-
-const fs = require('fs');
-const path = require('path');
-
-let version = process.argv[2];
-
-if (version) {
-  version = '@' + version;
-} else {
-  version = '';
-}
-
-const srcPath = path.join(__dirname, 'cdn-loader.js');
-let scriptContent = fs.readFileSync(srcPath, 'utf-8');
-
-// https://unpkg.com/@ionic/core@latest/dist/ionic.js
-
-scriptContent = scriptContent.replace(
-  /__CDN_LOADER_URL__/g,
-  'https://cdn.jsdelivr.net/npm/@ionic/core' + version
-);
-
-fs.writeFileSync(path.join(__dirname, '..', 'loader', 'cdn.js'), scriptContent);
-fs.writeFileSync(path.join(__dirname, '..', 'loader', 'index.cjs.js'), scriptContent);
diff --git a/core/src/components/item/test/fill/item.e2e.ts-snapshots/item-fill-diff-ios-rtl-Mobile-Safari-linux.png b/core/src/components/item/test/fill/item.e2e.ts-snapshots/item-fill-diff-ios-rtl-Mobile-Safari-linux.png
index 01c2c91a272..d6ded40acd0 100644
Binary files a/core/src/components/item/test/fill/item.e2e.ts-snapshots/item-fill-diff-ios-rtl-Mobile-Safari-linux.png and b/core/src/components/item/test/fill/item.e2e.ts-snapshots/item-fill-diff-ios-rtl-Mobile-Safari-linux.png differ
diff --git a/core/stencil.config.ts b/core/stencil.config.ts
index c7245686d91..30cc57a1e44 100644
--- a/core/stencil.config.ts
+++ b/core/stencil.config.ts
@@ -201,11 +201,6 @@ export const config: Config = {
     }),
   ],
   buildEs5: 'prod',
-  extras: {
-    dynamicImportShim: true,
-    initializeNextTick: true,
-    scriptDataOpts: true
-  },
   testing: {
     moduleNameMapper: {
       "@utils/test": ["<rootDir>/src/utils/test/utils"],