Examine source code of Holochrome

{
  "web_accessible_resources": [
    "disableReload.js"
  ],
  "commands": {
    "open-console": {
      "global": true,
      "suggested_key": {
        "default": "Ctrl+Shift+1",
        "mac": "Command+Shift+1"
      },
      "description": "Open a tab to AWS console"
    }
  },
  "browser_action": {
    "name": "Click to open AWS Console. Or press Cmd+Shift+1.",
    "default_icon": "holochrome-128.png"
  },
  "description": "Use your IAM role (from instance metadata) to open the AWS console.",
  "content_scripts": [
    {
      "matches": [
        "https://*.console.aws.amazon.com/*"
      ],
      "js": [
        "inject.js"
      ]
    }
  ],
  "icons": {
    "128": "holochrome-128.png"
  },
  "background": {
    "scripts": [
      "script.js"
    ]
  },
  "version": "1.4resigned1",
  "manifest_version": 2,
  "permissions": [
    "notifications",
    "webRequest",
    "https://signin.aws.amazon.com/federation",
    "https://*.signin.aws.amazon.com/oauth",
    "http://169.254.169.254/*",
    "https://console.aws.amazon.com/*",
    "https://aws.amazon.com/"
  ],
  "name": "Holochrome",
  "browser_specific_settings": {
    "gecko": {
      "id": "{7422e313-c6ae-4746-8918-d598114832b4}"
    }
  }
}