Examine source code of Rakuten: Get Cash Back For Shopping

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "short_name": "Rakuten",
  "version": "26.10.1",
  "homepage_url": "https://www.rakuten.com/",
  "author": "Rakuten",
  "manifest_version": 2,
  "default_locale": "en",
  "permissions": [
    "tabs",
    "webNavigation",
    "webRequest",
    "storage",
    "cookies",
    "alarms",
    "scripting",
    "<all_urls>"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "content_scripts": [
    {
      "all_frames": false,
      "matches": [
        "https://*.rakuten.com/*",
        "https://*.rakuten.co.uk/*"
      ],
      "js": [
        "js/libs/snippet.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "js/bg.js"
    ]
  },
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "img/icon/icon-32.png",
    "48": "img/icon/icon-64.png",
    "128": "img/icon/icon-128.png"
  },
  "web_accessible_resources": [
    "workers/*.js",
    "*.css",
    "*.js",
    "fonts/*.woff",
    "fonts/*.woff2",
    "fonts/*.ttf",
    "fonts/*.otf",
    "img/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{35d6291e-1d4b-f9b4-c52f-77e6410d1326}",
      "strict_min_version": "58.0"
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "img/icon/icon-32.png",
      "32": "img/icon/icon-32.png"
    },
    "default_title": "__MSG_extensionName__"
  }
}