Examine source code of Dropbox Dash

{
  "description": "Search tabs, bookmarks, and history with Dropbox Dash.",
  "version": "2.0.0",
  "manifest_version": 2,
  "name": "Dropbox Dropbox",
  "short_name": "Dropbox Dash",
  "permissions": [
    "bookmarks",
    "cookies",
    "history",
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "webNavigation"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Dropbox Dash",
    "default_icon": {
      "16": "icon16.png",
      "19": "icon19.png",
      "38": "icon38.png",
      "48": "icon48.png",
      "128": "icon128.png",
      "512": "icon512.png",
      "1024": "icon1024.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6a0ed3ac-331e-4f4d-91fb-56c4425d1581}"
    }
  },
  "omnibox": {
    "keyword": "go"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png",
    "512": "icon512.png",
    "1024": "icon1024.png"
  },
  "web_accessible_resources": [
    "dash_icon_logo.svg"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.bundle.js"
      ]
    }
  ]
}