Examine source code of Bionic Reader

{
  "manifest_version": 2,
  "name": "Bionic Reader",
  "version": "1.0.1",
  "description": "Toggle bionic reading on any website or PDF. Bolds the first part of each word to guide your eyes and read faster.",
  "browser_specific_settings": {
    "gecko": {
      "id": "bionic-reader@local.extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Bionic Reader",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "commands": {
    "toggle-bionic": {
      "suggested_key": {
        "default": "Ctrl+Alt+B"
      },
      "description": "Toggle bionic reading on the current page"
    }
  },
  "web_accessible_resources": [
    "viewer.html",
    "pdfjs/pdf.mjs",
    "pdfjs/pdf.worker.mjs"
  ]
}