Examine source code of LeoProxy

{
  "manifest_version": 2,
  "name": "LeoTrick – Accessibility Toolkit",
  "version": "2.2.0",
  "description": "Barrierefreiheit für alle: Mindest-Schriftgröße, Farbenblindheit-Modi, Hochkontrast, Schimpfwort-Filter und Link-Hervorhebung.",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leotrick@accessibility",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png"
    },
    "default_title": "LeoTrick – Accessibility Toolkit",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_start",
      "js": [
        "content/util.js",
        "content/state.js",
        "content/font.js",
        "content/color.js",
        "content/profanity.js",
        "content/hotlinks.js",
        "content/highcontrast.js",
        "content/frequentsite.js",
        "content/main.js"
      ]
    }
  ]
}