Examine source code of Basic Form Filler

{
  "manifest_version": 2,
  "name": "Basic Form Filler",
  "version": "1.5",
  "description": "WebExtensions basic form filler",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "author": "Travis Shelton",
  "applications": {
    "gecko": {
      "id": "basicformfiller@tsheltonprojects",
      "strict_min_version": "58.0"
    }
  },
  "commands": {
    "form-fill-save": {
      "suggested_key": {
        "default": "Alt+Shift+Q"
      },
      "description": "Send a 'form-fill-save' event"
    },
    "form-fill-restore": {
      "suggested_key": {
        "default": "Alt+Q"
      },
      "description": "Send a 'form-fill-restore' event"
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ]
}