Examine source code of minimal-vim-emulation

{
  "manifest_version": 2,
  "name": "Vim",
  "version": "0.0.0",
  "description": "Minimal Vim emulation.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "vim.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{36fe1405-b4f0-4b81-b351-3175547f7db5}"
    }
  }
}