Examine source code of Cache Cleaner

{
  "manifest_version": 3,
  "name": "__MSG_name__",
  "description": "__MSG_description__",
  "version": "1.0.1",
  "short_name": "__MSG_short_name__",
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "default_locale": "en",
  "homepage_url": "https://cssnr.github.io/cache-cleaner/",
  "permissions": [
    "activeTab",
    "browsingData",
    "contextMenus",
    "scripting",
    "storage"
  ],
  "commands": {
    "cache_site": {
      "description": "__MSG_cmd_cache_site__",
      "suggested_key": {
        "default": "F4"
      }
    },
    "cache_siteAll": {
      "description": "__MSG_cmd_cache_siteAll__",
      "suggested_key": {
        "default": "F6"
      }
    },
    "cache_browser": {
      "description": "__MSG_cmd_cache_browser__"
    },
    "cache_browserAll": {
      "description": "__MSG_cmd_cache_browserAll__"
    },
    "_execute_action": {
      "description": "__MSG_cmd_executeAction__",
      "suggested_key": {
        "default": "Alt+Shift+A"
      }
    },
    "openSidePanel": {
      "description": "__MSG_cmd_openSidePanel__"
    },
    "openExtPanel": {
      "description": "__MSG_cmd_openExtPanel__"
    },
    "openOptions": {
      "description": "__MSG_cmd_openOptions__",
      "suggested_key": {
        "default": "Alt+Shift+O"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "cache-cleaner@cssnr.com",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "120.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "96": "icons/96.png",
      "128": "icons/128.png"
    }
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "96": "icons/96.png",
      "128": "icons/128.png"
    },
    "open_at_install": false
  }
}