Examine source code of http-auth-enhancer

{
  "manifest_version": 2,
  "name": "Auth Enhancer",
  "version": "0.1.1resigned1",
  "developer": {
    "name": "Evert Pot",
    "url": "https://evertpot.com/"
  },
  "description": "Adds much-needed HTTP auth enhancements to your browser.",
  "icons": {
    "48": "icons/icon-red.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "icons/icon-red.svg"
  },
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b89e924f-491e-4aa7-8547-411cee972fd3}"
    }
  }
}