Examine source code of NoBankAlert

{
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "browser_action": {
    "default_title": "NoBankAlert Options",
    "default_icon": {
      "32": "nobank.svg"
    }
  },
  "icons": {
    "32": "nobank.svg"
  },
  "description": "Τα usernames των λογαρισμών σας.",
  "homepage_url": "https://github.com/mdn/webextensions-examples/tree/master/favourite-colour",
  "manifest_version": 2,
  "name": "NoBankAlert",
  "options_ui": {
    "page": "nobankalert_options.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script_nobankalert.js"
      ]
    }
  ],
  "permissions": [
    "cookies",
    "<all_urls>",
    "storage",
    "tabs"
  ],
  "version": "1.4",
  "browser_specific_settings": {
    "gecko": {
      "id": "no-bank-alert@theoddcat.gr",
      "strict_min_version": "57.0a1"
    }
  }
}