Examine source code of PoweredON

{
  "description": "Very simple block all images toggle, and copy source url context menu extension. Following the philosophy  'Keep it simple, stupid.'",
  "manifest_version": 2,
  "name": "PoweredON",
  "version": "3.0.0",
  "homepage_url": "https://on1.dev",
  "icons": {
    "32": "icons/favicon-32x32.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "js/background.js",
      "js/sketch.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/favicon-32x32.png"
    }
  },
  "commands": {
    "toggle-feature": {
      "suggested_key": {
        "default": "Ctrl+Shift+B",
        "linux": "Ctrl+Shift+B"
      },
      "description": "Toggle Blocking"
    }
  }
}