Examine source code of Focus for Google Docs

{
  "name": "Focus for Google Docs",
  "short_name": "Focus",
  "description": "Focus for Google Docs helps you enter the writing flow by decluttering Google Docs and adding a pomodoro timer.",
  "author": "Joel Grayson",
  "version": "1.6",
  "manifest_version": 3,
  "minimum_chrome_version": "102",
  "homepage_url": "https://joelgrayson.com/software/focus",
  "action": {
    "default_icon": "icons/on-128.png",
    "default_popup": "popup/index.html"
  },
  "icons": {
    "16": "icons/on-16.png",
    "32": "icons/on-32.png",
    "48": "icons/on-48.png",
    "128": "icons/on-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://docs.google.com/document/*"
      ],
      "js": [
        "dist/injected.js"
      ],
      "css": [
        "dist/pomodoro.css",
        "dist/focus.css"
      ]
    }
  ],
  "commands": {
    "toggle-focus": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "Command+Shift+F"
      },
      "description": "Toggle Focus"
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "focusforgoogledocs@joelgrayson.com",
      "strict_min_version": "109.0"
    }
  }
}