Examine source code of DARA

{
  "background": {
    "scripts": [
      "/js/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "128": "/images/icon128.png"
    },
    "default_title": "DARA",
    "default_popup": "/html/menu.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "/js/fonts.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file:///*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "DARA enables users to permanently and immutably store virtually any web content forever, using IPFS and Blockchain technologies.",
  "manifest_version": 2,
  "icons": {
    "16": "/images/icon16.png",
    "24": "/images/icon24.png",
    "32": "/images/icon32.png",
    "48": "/images/icon48.png",
    "128": "/images/icon128.png"
  },
  "name": "DARA",
  "permissions": [
    "http://*/*",
    "https://*/*",
    "file:///*",
    "tabs",
    "webNavigation",
    "webRequest",
    "storage"
  ],
  "version": "1.7.8.9",
  "web_accessible_resources": [
    "/html/*.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1c78b49-8320-4494-af18-d5351efaf996}"
    }
  }
}