Examine source code of Bold Metaguiding

{
  "manifest_version": 2,
  "name": "Bold Metaguiding",
  "description": "Read faster with bold metaguiding",
  "version": "1.0.0",
  "icons": {
    "16": "icon-16.png",
    "24": "icon-24.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "data_collection_permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      },
      "id": "{c1946bd5-60d0-48d3-a4c3-d501b31c9481}"
    }
  },
  "browser_action": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}