The process is very straightforward.
1. Get the uninstall code and other information by logging into your WebFilter Control Panel.
(The information is at the bottom of the screen)
2. Enter the information in the tools tab of the WebFilter app.
3. Click on the "Disable Webfilter" button
If you want to enable, the same as above but click on the "Enable Webfilter" button.
To complete remove WebFilter from your device. Please follow one of the following articles.