Examine source code of Anchor PDF Reader

{
  "manifest_version": 3,
  "name": "Anchor PDF Reader",
  "version": "0.3.0",
  "description": "A Firefox PDF reader that shows interactive citation previews as you read.",
  "browser_specific_settings": {
    "gecko": {
      "id": "anchor-reader@datalab.to",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>",
    "https://api.openalex.org/*",
    "https://api.crossref.org/*",
    "https://api.semanticscholar.org/*"
  ],
  "background": {
    "scripts": [
      "background/intercept.js"
    ]
  },
  "action": {
    "default_title": "Anchor — choose sites",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "viewer/web/*",
        "viewer/build/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}