Examine source code of FortiClient WebFilter

{
  "version": "7.2.4.972",
  "name": "FortiClient WebFilter",
  "description": "This extension will give forticlient web filter function under Mozilla Firefox",
  "background": {
    "page": "background.html"
  },
  "icons": {
    "128": "logo128.png"
  },
  "browser_action": {
    "default_icon": "logo128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "js": [
        "contentscript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "*.png"
  ],
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "downloads",
    "<all_urls>"
  ],
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "fctextension@fortinet.com"
    }
  }
}