I installed Adblock Plus on my Galaxy Tab 3 and it doesn't work. It keeps saying "Waiting for traffic on port 2020". I tried following [these instructions](https://adblockplus.org/en/android-config#proxy) and setting up the internet connection to use proxy local host and port 2020. My device is rooted. By the way, is there a simple website I can use to test to see if Adblock plus is working?