started browser extension

extension/background.js

@@ -0,0 +1,10 @@
+const IFRAME_HEADERS = ['content-security-policy', 'x-frame-options'];
+const isFirefox = navigator.userAgent.includes('Firefox');
+
+chrome.webRequest.onHeadersReceived.addListener(
+  (details) => ({
+    responseHeaders: details.responseHeaders.filter((header) => !IFRAME_HEADERS.includes(header.name.toLowerCase())),
+  }),
+  { urls: ['<all_urls>'] },
+  ['blocking', 'responseHeaders']
+);

extension/manifest.json

@@ -0,0 +1,13 @@
+{
+  "manifest_version": 2,
+  "name": "Turtle",
+  "description": "Allows syncing shows/movies of subscription services",
+  "background": {
+    "scripts": ["background.js"]
+  },
+  "permissions": ["webRequest", "webRequestBlocking", "<all_urls>"],
+  "version": "1.0",
+  "icons": {
+    "48": "icon_48.png"
+  }
+}