Examine source code of Auto Form Fillers

{
  "manifest_version": 2,
  "name": "Auto Form Filler BD",
  "version": "1.0",
  "description": "Automatically fills forms with random or predefined Bangladeshi data.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{649f5fed-c87c-44cd-b67b-1b4003099440}"
    }
  }
}