QUEST3+ System is only compatible with Google Chrome & Mozilla Firefox Version 45 to version 51. Please uninstall Firefox version 52 and above and reinstall with following firefox version :

How To Disable Auto-Update on Firefox

Firefox occasionally checks to see if any updates are available for itself and for your search engines. To disable these checks:

1. Click the menu button and choose Options.
2. Select the Advanced panel.
3. Select the Update tab.
4. Check Never check for updates (not recommended: security risk) and uncheck Search Engines.
5. Close the about:preferences page. Any changes you've made will automatically be saved.