Examine source code of Dislection

{
  "manifest_version": 2,
  "name": "Dislection",
  "version": "1.0",
  "description": "Add dyslexic font to any webpage",
  "icons": {},
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "dislection.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "fonts/OpenDyslexicMono-Regular.otf"
  ]
}