Examine source code of Inject Xdi8

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "0.2.5",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/MessageManager.js",
        "content_scripts/main.js"
      ],
      "css": [
        "content_scripts/main.css"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "lib/browser-polyfill.js",
      "lib/MessageManager.js",
      "lib/Trie.js",
      "background_scripts/main.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "content_scripts/FiraXdi8Variable-subset.woff2",
    "popup/FiraXdi8Variable-subset.woff2"
  ],
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "default_locale": "en",
  "browser_action": {
    "default_icon": "icons/96.png",
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup/index.html"
  }
}