AVG Web TuneUp problems

I am having the exact issue with AVG Web TuneUp and Firefox as the person who received the response I found and sent to you.

Web TuneUp is not activated. When I click on the button I get a screen that .  When I click on "Restart Browser" all it does is close Firefox.  I have searched and cannot find a plugin for Web TuneUp anywhere.  Plugin is not intalled inyour default web browser: Mozilla Firefox.  Restart your browser and allow AVG Web TuneUp to install.  I am using Firefox version 52.0.2 (32-bit).

Hello Michael,
Thank you for your efforts. We keep you informed that the issue which you are currently experiencing from your side has been fixed. You can try to install AVG Web Tune up on Firefox browser.
If you are facing any issues, please get back with us we are here to help you.
Thank you.

I found the following post from Jan 7, 2016.  Is this unresolved still in April 2017?

Hello Susan.
We are sorry to hear about the inconvenience caused. Unfortunately, AVG web tuneup is experiencing an issue with Firefox and as per now, we suggest you to make Google chrome or Internet explorer as your default web browser and install AVG web tuneup. Thank you.
  • January 7, 2016

Hello Michael,
Thank you for your efforts. We keep you informed that the issue which you are currently experiencing from your side has been fixed. You can try to install AVG Web Tune up on Firefox browser.
If you are facing any issues, please get back with us we are here to help you.
Thank you.

I am having the exact issue with AVG Web TuneUp and Firefox as the person who received the response I found and sent to you.

Web TuneUp is not activated. When I click on the button I get a screen that .  When I click on "Restart Browser" all it does is close Firefox.  I have searched and cannot find a plugin for Web TuneUp anywhere.  Plugin is not intalled inyour default web browser: Mozilla Firefox.  Restart your browser and allow AVG Web TuneUp to install.  I am using Firefox version 52.0.2 (32-bit).

Hello Michael,
We regret for the inconvenience caused. Since you have mentioned that you are facing issue with AVG Web Tune up, no need to worry, we are here to help you. We would request you to remove AVG Web Tune up by using our AVG Remover tool. Once it has been removed please try to remove AVG Web Tune up file in Program x86 files on C Drive.
We wish to keep you informed that  AVG Web TuneUp is the free browser add-on and it helps you to browse securely on the Internet. It gets installed only on the default browser of your PC and it is not compatible with the Windows 10 Edge browser and Chrome.
If you have Firefox or Internet explorer as default browser try to install AVG Web Tune up on it.