Examine source code of The Source Taster

{
  "manifest_version": 3,
  "name": "The Source Taster",
  "version": "2.1.1",
  "description": "Source Taster is a browser extension that helps users quickly verify the validity and existence of sources cited in academic papers.",
  "action": {
    "default_icon": {
      "16": "assets/icon16.png",
      "32": "assets/icon32.png",
      "48": "assets/icon48.png",
      "128": "assets/icon128.png"
    },
    "default_popup": "dist/popup/index.html"
  },
  "options_ui": {
    "page": "dist/options/index.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "dist/background/index.mjs"
    ],
    "type": "module"
  },
  "icons": {
    "16": "assets/icon16.png",
    "32": "assets/icon32.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "dist/contentScripts/index.global.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "dist/contentScripts/style.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@sourcetaster.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "default_locale": "en",
  "sidebar_action": {
    "default_panel": "dist/sidepanel/index.html"
  }
}