Examine source code of Page Guides

{
  "manifest_version": 2,
  "name": "Page Guides",
  "version": "1.0.0",
  "description": "Drag Photoshop-style guides onto any page to check alignment. Built by TripperDeeLabs.",
  "browser_action": {
    "default_title": "Page Guides",
    "default_popup": "popup.html",
    "default_icon": {
      "200": "icon.png"
    }
  },
  "icons": {
    "200": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "page-guides@tripperdeelabs.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}