Examine source code of Feed Shaper

{
  "manifest_version": 3,
  "name": "Feed Shaper",
  "version": "39.1",
  "author": "JM",
  "description": "Feed Shaper is a feed reader that supports RSS and Atom formats. Optimized for headlines, it suits for previewing the latest information.",
  "icons": {
    "48": "feed48.svg",
    "96": "feed48.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "id": "{b24b0760-b283-4888-8f1f-31bda3abe82c}",
      "strict_min_version": "146.0"
    },
    "gecko_android": {
      "strict_min_version": "146.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'"
  },
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "permissions": [
    "declarativeNetRequestWithHostAccess",
    "menus",
    "scripting",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "action": {
    "default_icon": "feed48.svg",
    "default_popup": "html/bookmarks.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "js": [
        "content_scripts/resident.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "open_in_tab": true,
    "page": "html/options.html"
  },
  "web_accessible_resources": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "resources": [
        "common/core.mjs",
        "common/feed.mjs",
        "common/log.mjs",
        "common/style.mjs"
      ]
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "resources": [
        "common/parts.mjs",
        "common/path.mjs",
        "menus.mjs"
      ]
    },
    {
      "extension_ids": [
        "*"
      ],
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "resources": [
        "html/viewer.html"
      ]
    }
  ]
}