Page Grid Ruler

manifest.json

{
  "manifest_version": 3,
  "version": "0.1.1",
  "name": "Page Grid Ruler",
  "description": "Draw a grid view, get page dimensions in pixel (px) unit and draw a rule",
  "offline_enabled": true,
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "scripting"
  ],
  "homepage_url": "https://webextension.org/listing/page-ruler.html",
  "icons": {
    "16": "/data/icons/16.png",
    "32": "/data/icons/32.png",
    "48": "/data/icons/48.png",
    "64": "/data/icons/64.png",
    "128": "/data/icons/128.png",
    "256": "/data/icons/256.png",
    "512": "/data/icons/512.png"
  },
  "action": {},
  "background": {
    "service_worker": "worker.js"
  },
  "commands": {
    "_execute_action": {}
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/data/view/index.html"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}