Examine source code of Flickr Fixr

{
  "manifest_version": 3,
  "name": "Flickr Fixr",
  "short_name": "Flickr Fixr",
  "description": "Makes Flickr almost awesome - while waiting for SmugMug to fully fix it ;-)",
  "version": "2.8.0",
  "author": "Stig Nygaard",
  "homepage_url": "https://github.com/StigNygaard/Stigs_Flickr_Fixr",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.flickr.com/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none'"
  },
  "icons": {
    "16": "icons/fr16.png",
    "32": "icons/fixr32.png",
    "48": "icons/fixr48.png",
    "64": "icons/fixr64.png",
    "96": "icons/fixr96.png",
    "128": "icons/fixr128.png",
    "256": "icons/fixr256.png"
  },
  "action": {},
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "128.0",
      "id": "{266065e3-e12f-4eb1-9ba0-9506ae8f6c9e}"
    }
  },
  "minimum_chrome_version": "121.0",
  "minimum_opera_version": "107.0",
  "minimum_edge_version": "121.0",
  "background": {
    "scripts": [
      "background/flickr_fixr.js"
    ],
    "service_worker": "background/flickr_fixr.js",
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.flickr.com/*",
        "*://*.flickr.net/*"
      ],
      "exclude_matches": [
        "*://api.flickr.com/*",
        "*://identity.flickr.com/*",
        "*://*.flickr.com/signin/*",
        "*://*.flickr.com/signup/*",
        "*://*.flickr.com/account/*"
      ],
      "js": [
        "options/options.js",
        "Stigs_Flickr_Fixr.user.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "inject/timeout.js"
      ],
      "matches": [
        "https://*.flickr.com/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  }
}