Examine source code of Coverlay

{
  "manifest_version": 3,
  "name": "Coverlay",
  "version": "1.0.0",
  "description": "Hide what you don't want to see. ",
  "action": {
    "default_title": "Toggle Draw Overlay",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png"
    }
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage",
    "scripting",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "toggle-overlay": {
      "suggested_key": {
        "default": "Alt+Shift+A",
        "mac": "Alt+Shift+A"
      },
      "description": "Toggle drawing overlay on the current page"
    },
    "enable-draw-mode": {
      "description": "Toggle draw mode"
    },
    "toggle-drawings-visibility": {
      "description": "Show/hide drawings"
    },
    "toggle-ui-visibility": {
      "description": "Show/hide overlay UI"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "19": "icons/19.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "38": "icons/38.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "96": "icons/96.png",
    "128": "icons/128.png",
    "256": "icons/256.png",
    "512": "icons/512.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "coverlay@hansp27.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}