Examine source code of FlowPick - Media Sniffer & Downloader

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.1.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "downloads",
    "declarativeNetRequest",
    "notifications",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "content_security_policy": "script-src 'self' 'wasm-unsafe-eval';",
  "web_accessible_resources": [
    "/injected.js"
  ],
  "homepage_url": "https://flowpick.net",
  "browser_specific_settings": {
    "gecko": {
      "id": "flowpick@flowpick.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "FlowPick",
    "open_at_install": false
  },
  "browser_action": {
    "default_title": "FlowPick",
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "128": "icon/128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "all_frames": true,
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "*://www.douyin.com/*",
        "*://www.iesdouyin.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/douyin.js"
      ]
    }
  ]
}