Examine source code of TubeNo

{
  "name": "TubeNo",
  "version": "1.0",
  "description": "Remove videos from the homepage and place an inspirational quote",
  "manifest_version": 2,
  "permissions": [
    "webRequest",
    "activeTab",
    "storage",
    "webRequestBlocking",
    "*://*.youtube.com/",
    "*://*.youtu.be/",
    "https://api.forismatic.com/"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "quote_Page/*"
  ],
  "browser_action": {
    "default_popup": "../popup_Page/popup.html",
    "default_icon": {
      "16": "img/icon_16.png",
      "32": "img/icon_32.png",
      "48": "img/icon_48.png",
      "128": "img/icon_128.png"
    }
  },
  "icons": {
    "16": "img/icon_16.png",
    "32": "img/icon_32.png",
    "48": "img/icon_48.png",
    "128": "img/icon_128.png"
  }
}