Examine source code of RegEx URL Replacer

{
  "name": "RegEx URL Replacer",
  "description": "Apply a regex pattern to the URLs of all your tabs in the active window.",
  "permissions": [
    "tabs"
  ],
  "icons": {
    "48": "icon.svg",
    "64": "icon.svg",
    "80": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "tool.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "tool.html"
  },
  "version": "1.0",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{078fe9ba-5c7f-45a7-965b-8e02f7f2b906}"
    }
  }
}