Examine source code of Hide Funimation UI

{
  "name": "Hide Funimation UI",
  "version": "2.0",
  "description": "Hide/show Funimation video UI with 'z' and use PageUp/PageDown or ArrowUp/ArrowDown keys to seek 1 second back/forward",
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "*://www.funimation.com/v/*"
      ],
      "js": [
        "content_script.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "page_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/no_funi_ui16.png",
      "32": "images/no_funi_ui32.png",
      "48": "images/no_funi_ui48.png",
      "128": "images/no_funi_ui128.png"
    }
  },
  "icons": {
    "16": "images/no_funi_ui16.png",
    "32": "images/no_funi_ui32.png",
    "48": "images/no_funi_ui48.png",
    "128": "images/no_funi_ui128.png"
  },
  "manifest_version": 2
}