Examine source code of Hashsey

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "version": "1.0.1",
  "default_locale": "es",
  "description": "__MSG_extDescription__",
  "homepage_url": "https://github.com/Seyronh/hashsey",
  "icons": {
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "64": "icons/icon.svg"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/icon.svg",
      "48": "icons/icon.svg",
      "64": "icons/icon.svg"
    },
    "default_title": "__MSG_extTitle__",
    "default_popup": "popup/popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8d166239-dcf2-4850-9f60-6727de16a1cd}"
    }
  }
}