Examine source code of EncryptNow

{
  "manifest_version": 2,
  "name": "EncryptNow",
  "version": "1.0",
  "description": "Encrypts text messages before sharing via email or social platforms.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8cc02ceb-5bc5-41d6-ad1d-c4878b4b8b02}"
    }
  }
}