Examine source code of Paperpile

{
  "background": {
    "page": "dist-new/html/background.html"
  },
  "browser_action": {
    "default_icon": {
      "19": "images/icon-light-default-19.png",
      "38": "images/icon-light-default-38.png"
    },
    "default_title": "__MSG_appBrowserActionTitle__"
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "113.0",
      "id": "firefox-production@paperpile.com"
    }
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {}
    }
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "dist-new/cs-webapp.js"
      ],
      "matches": [
        "*://app.paperpile.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "default_locale": "en",
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-light-manifest-16.png",
    "32": "images/icon-light-manifest-32.png",
    "48": "images/icon-light-manifest-48.png",
    "96": "images/icon-light-manifest-96.png",
    "128": "images/icon-light-manifest-128.png"
  },
  "manifest_version": 2,
  "name": "__MSG_appTitle__",
  "permissions": [
    "contextMenus",
    "tabs",
    "scripting",
    "<all_urls>",
    "storage",
    "unlimitedStorage",
    "declarativeNetRequestWithHostAccess",
    "alarms"
  ],
  "short_name": "__MSG_appShortName__",
  "version": "1.0.120",
  "web_accessible_resources": [
    "dist-new/html/permissions.html",
    "images/*.png"
  ],
  "homepage_url": "https://paperpile.com/?welcome"
}