Examine source code of Metric Glance

{
  "manifest_version": 2,
  "name": "Metric Glance",
  "version": "0.47.1",
  "description": "Converts imperial units to metric and rounds large prices. Hover (desktop) or tap (mobile) the dotted text to see the original or correct it. Right-click a selection to teach it new conversions.",
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "alarms",
    "notifications",
    "https://mg-collect.metric-glance.workers.dev/*",
    "https://ja-ortiz-uniandes.github.io/metric-glance/privacy.html"
  ],
  "commands": {
    "open-picker": {
      "suggested_key": {
        "default": "Ctrl+Alt+M",
        "mac": "Command+Alt+M"
      },
      "description": "Open the Metric Glance unit picker for the current selection"
    }
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Metric Glance",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js",
      "mg-uploader.js",
      "mg-privacy-watch.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "metric-glance@cach-dies",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "converter.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}