Examine source code of Better View Image

{
  "manifest_version": 2,
  "name": "Better View Image",
  "short_name": "BVI",
  "description": "A sensible, configurable, no-nonsense image viewer.",
  "version": "1.1resigned1",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "betterViewImage.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1cb905ba-34c0-4585-8c0e-39a09e423374}"
    }
  }
}