Examine source code of RSS Sage-Like

{
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "sage-like@webExtension.arielg.il",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "name": "Sage-Like",
  "version": "3.14",
  "description": "A fast and lightweight sidebar-based feed reader. Supports Atom, RSS, JSON, and RDF feeds with customizable UI and seamless integration with your browser’s bookmarks and sync capabilities.",
  "author": "arielg",
  "permissions": [
    "bookmarks",
    "history",
    "tabs",
    "menus",
    "clipboardRead",
    "clipboardWrite",
    "storage",
    "downloads",
    "scripting",
    "alarms",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'"
  },
  "icons": {
    "16": "/icons/sageLike-16.png",
    "32": "/icons/sageLike-32.png",
    "48": "/icons/sageLike-48.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/feedPreview/feedPreview.html"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "action": {
    "default_title": "Sage-Like sidebar",
    "default_icon": {
      "16": "/icons/sageLike-16.png",
      "32": "/icons/sageLike-32.png",
      "48": "/icons/sageLike-48.png"
    }
  },
  "sidebar_action": {
    "default_title": "Sage-Like",
    "default_panel": "/sidebar/panel.html",
    "default_icon": {
      "16": "/icons/sageLike-16.png",
      "32": "/icons/sageLike-32.png",
      "48": "/icons/sageLike-48.png"
    }
  },
  "page_action": {
    "default_icon": {
      "19": "/icons/pagePopup-gray-19.png",
      "38": "/icons/pagePopup-gray-38.png"
    },
    "default_title": "Subscribe Using Sage-Like",
    "default_popup": "/pagePopup/pagePopup.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F2"
      },
      "description": "Toggle Sage-Like sidebar"
    }
  },
  "background": {
    "scripts": [
      "/shared/unknownXMLNamedEntitiesData.js",
      "/shared/common.js",
      "/shared/rssTreeData.js",
      "/syndication/helpers.js",
      "/syndication/feed.js",
      "/syndication/xmlFeed.js",
      "/syndication/jsonFeed.js",
      "/syndication/rssFeed.js",
      "/syndication/rdfFeed.js",
      "/syndication/atomFeed.js",
      "/syndication/feedFactory.js",
      "/syndication/websiteSpecificDiscovery.js",
      "/syndication/syndication.js",
      "/permissions/requiredPermissions.js",
      "/background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "/preferences/preferences.html"
  }
}