Examine source code of Heise Single Page

{
  "name": "Heise Single Page",
  "description": "Displays news articles on heise.de as single page",
  "manifest_version": 2,
  "version": "1.12.1",
  "homepage_url": "https://gitlab.com/dns2utf8/heise_single_page",
  "icons": {
    "48": "logo.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "incognito": "spanning",
  "content_scripts": [
    {
      "matches": [
        "*://*.heise.de/*",
        "*://*.telepolis.de/*",
        "*://*.techstage.de/*",
        "*://*.guenstiger.de/*",
        "*://*.t3n.de/*"
      ],
      "js": [
        "./hsp.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true,
    "chrome_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{adbe1059-6482-4834-a745-424778bde07a}",
      "strict_min_version": "78.0"
    }
  }
}