1) Google Chrome:
1. On your computer, open Google Chrome.
2. At the top right, click More 
>> More tools >> Extensions.
3. Click on Remove button to remove Proctortrack plugin from Browser.
2) Mozilla Firefox:
1. Click the menu button click Add-ons and select Extensions.
2. Scroll through the list of extensions. Then click the ellipsis (3-dot) icon for the Proctortrack extension and select Remove.
3. Then confirm the removal by clicking the Remove button.