Examine source code of vim-navigation

{
  "applications": {
    "gecko": {
      "id": "vim-navigations@783c6550-0cc9-4c3f-855f-5ddbeae91ea3"
    }
  },
  "author": "Mehmet Baker",
  "background": {
    "scripts": [
      "lib/DEFAULTS.js",
      "lib/EventEmitter.js",
      "lib/StorageController.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "lib/DEFAULTS.js",
        "lib/EventEmitter.js",
        "lib/StorageController.js",
        "lib/Actions.js",
        "lib/VimNavigation.js",
        "content-script.js"
      ],
      "match_about_blank": true,
      "run_at": "document_start"
    }
  ],
  "description": "A browser add-on for vim-style scrolling and tab navigation",
  "homepage_url": "https://github.com/mehmetb/vim-navigation",
  "incognito": "spanning",
  "manifest_version": 2,
  "name": "vim-navigation",
  "version": "1.3.3resigned1",
  "options_ui": {
    "page": "options/index.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ]
}