Examine source code of NoNoise - Distraction Blocker & Focus Tool

{
  "manifest_version": 3,
  "name": "NoNoise - Distraction Blocker & Focus Tool",
  "version": "3.0.4",
  "description": "Hide YouTube Shorts, Facebook Reels & distracting feeds. Free, no tracking, runs locally. Your focus, your rules.",
  "permissions": [
    "storage",
    "alarms",
    "activeTab"
  ],
  "host_permissions": [
    "https://gist.githubusercontent.com/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nonoise@jubayer.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icon16.png",
      "48": "assets/icon48.png",
      "128": "assets/icon128.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content/content.css"
      ],
      "js": [
        "content/content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "blocked/blocked.html",
        "assets/quotes.json",
        "assets/audios/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "commands": {
    "increase-speed": {
      "suggested_key": {
        "default": "Alt+Up",
        "mac": "MacCtrl+Up"
      },
      "description": "Increase Video Speed"
    },
    "decrease-speed": {
      "suggested_key": {
        "default": "Alt+Down",
        "mac": "MacCtrl+Down"
      },
      "description": "Decrease Video Speed"
    },
    "reset-speed": {
      "suggested_key": {
        "default": "Alt+R",
        "mac": "MacCtrl+R"
      },
      "description": "Reset Video Speed to 1x"
    }
  }
}