Examine source code of CSS Selector Generator

{
  "manifest_version": 3,
  "name": "CSS Selector Generator",
  "description": "Generate unique CSS selector for any element on web page with ease.",
  "version": "0.1.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "author": "rxliuli",
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "96": "icon/96.png",
      "128": "icon/128.png"
    }
  },
  "homepage_url": "https://rxliuli.com/projects/css-selector-generator",
  "browser_specific_settings": {
    "gecko": {
      "id": "css-selector-generator@rxliuli.com"
    }
  },
  "devtools_page": "devtools.html"
}