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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_extName__",
  "version": "1.3.9",
  "default_locale": "en",
  "description": "__MSG_extDesc__",
  "icons": {
    "16": "16.png",
    "48": "48.png",
    "128": "128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "options_page": "options.html",
  "browser_action": {
    "default_icon": {
      "19": "19.png",
      "38": "38.png"
    },
    "default_popup": "popup.html",
    "default_title": "__MSG_extName__"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "permissions": [
    "notifications",
    "storage"
  ],
  "minimum_chrome_version": "49",
  "manifest_version": 2
}