Examine source code of Keyboard Browsing

{
  "manifest_version": 2,
  "name": "Keyboard Browsing",
  "description": "Adds numbered navigation markers to a page.",
  "version": "1.2.1resigned1",
  "homepage_url": "https://github.com/potockyt/kbb-ext",
  "author": "Tomas Potocky",
  "applications": {
    "gecko": {
      "id": "kkb-ext@fairlyterrible.name",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "48": "icons/kbb_icon_48.png",
    "96": "icons/kbb_icon_96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "defaults.js",
        "style.js",
        "mod.js",
        "marker.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ]
}