Examine source code of ImageOptimizer

{
  "manifest_version": 3,
  "name": "ImageOptimizer",
  "version": "1.0",
  "description": "Automatic Image Compression for Faster Loading",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "ImageOptimizer",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "activeTab",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "imageoptimizer@pixelperf.tech"
    }
  }
}