Examine source code of Always on Top

{
  "description": "Always on Top",
  "manifest_version": 2,
  "name": "Always on Top",
  "version": "6.3",
  "applications": {
    "gecko": {
      "id": "{E6C93316-271E-4b3d-8D7E-FE11B4350AEB}",
      "strict_min_version": "50.0"
    }
  },
  "permissions": [
    "nativeMessaging",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/aot_unpinned_19.png",
    "default_title": "Always on Top",
    "browser_style": true
  },
  "commands": {
    "always-on-top": {
      "suggested_key": {
        "default": "Ctrl+Shift+F7"
      },
      "description": "Toogles Always on Top"
    }
  },
  "icons": {
    "16": "icons/aot_unpinned_16.png",
    "19": "icons/aot_unpinned_19.png",
    "32": "icons/aot_unpinned_32.png",
    "38": "icons/aot_unpinned_38.png",
    "48": "icons/aot_unpinned_48.png",
    "64": "icons/aot_unpinned_64.png",
    "96": "icons/aot_unpinned_96.png",
    "128": "icons/aot_unpinned_128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}