Examine source code of LULO

{
  "manifest_version": 2,
  "name": "LULO",
  "author": "Jeremiah Lee",
  "developer": {
    "name": "Jeremiah Lee",
    "url": "https://www.jeremiahlee.com/"
  },
  "version": "0.1.0",
  "description": "Reduce eye strain from computer vision syndrome",
  "homepage_url": "https://www.jeremiahlee.com/lulo/",
  "icons": {
    "48": "icon.png",
    "96": "icon@2x.png",
    "97": "icon.svg"
  },
  "permissions": [
    "<all_urls>",
    "alarms",
    "idle",
    "storage",
    "tabs",
    "webNavigation"
  ],
  "background": {
    "page": "./lib/background.html"
  },
  "content_scripts": [
    {
      "css": [
        "./lib/content-script.css"
      ],
      "matches": [
        "*://*/*"
      ],
      "js": [
        "./lib/content-script.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "./lib/options.html"
  },
  "browser_action": {
    "default_icon": "./lib/icons/browseraction-active.svg",
    "theme_icons": [
      {
        "light": "./lib/icons/browseraction-active.svg",
        "dark": "./lib/icons/browseraction-active.svg",
        "size": 32
      }
    ],
    "default_title": "Pause eye breaks",
    "default_popup": "./lib/browser-action-popup.html"
  }
}