Examine source code of FlagBar - Your identity colors on YouTube

{
  "manifest_version": 3,
  "name": "FlagBar - Your identity colors on YouTube",
  "short_name": "FlagBar",
  "version": "1.2.0",
  "version_name": "1.2.0",
  "author": "Czogista & Sayouri65 from NoName Squad",
  "developer": {
    "name": "Sayouri65",
    "url": "https://sayouri.dev/"
  },
  "description": "Transform YouTube's progress bar with beautiful identity flags colors",
  "homepage_url": "https://flagbar.nnamesquad.top/",
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "polyfill.js",
        "themes.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "icons": {
    "16": "icon/icon16.png",
    "32": "icon/icon32.png",
    "48": "icon/icon48.png",
    "64": "icon/icon64.png",
    "128": "icon/icon128.png",
    "256": "icon/icon256.png",
    "512": "icon/icon512.png",
    "1024": "icon/icon1024.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "*://www.youtube.com/*",
    "*://youtube.com/*",
    "*://m.youtube.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "flagbarapp@nnamesquad.top",
      "strict_min_version": "109.0"
    },
    "gecko_android": {
      "strict_min_version": "109.0"
    }
  },
  "background": {
    "scripts": [
      "polyfill.js",
      "background.js"
    ],
    "persistent": false
  },
  "action": {
    "default_title": "FlagBar - Your identity colors on YouTube",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon/icon16.png",
      "32": "icon/icon32.png",
      "48": "icon/icon48.png",
      "64": "icon/icon64.png",
      "128": "icon/icon128.png",
      "256": "icon/icon256.png",
      "512": "icon/icon512.png",
      "1024": "icon/icon1024.png"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "*.css",
        "*.js"
      ],
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*",
        "*://m.youtube.com/*"
      ]
    }
  ]
}