Examine source code of Volume BoosterX

{
  "manifest_version": 3,
  "name": "Volume BoosterX",
  "version": "10",
  "description": "",
  "homepage_url": "https://remus.fun/",
  "icons": {
    "96": "ico.svg"
  },
  "optional_permissions": [
    "<all_urls>",
    "activeTab"
  ],
  "permissions": [
    "storage",
    "activeTab"
  ],
  "action": {
    "default_icon": "ico.svg",
    "default_title": "Volume BoosterX",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "*://*/*",
        "https://*/*",
        "file:///*"
      ],
      "exclude_globs": [
        "https://remus.fun/"
      ],
      "js": [
        "lib/arrive.min.js",
        "testplugin.js",
        "cs.js"
      ],
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "commands": {
    "_execute_action": {
      "description": "Open volume Booster"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{daf44bf9-a95e-4450-979c-91cf07434c3d}",
      "strict_min_version": "42.0"
    }
  }
}