Examine source code of Miv

{
  "manifest_version": 2,
  "name": "Miv",
  "version": "1.7",
  "description": "Some vim like keymappings for Firefox and Chromium browsers.",
  "icons": {
    "48": "icons/icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "miv.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "minivim@mathiashh.dk"
    }
  }
}