This extension does not allow itself to be removed from Firefox. It's almost impossible to get rid of it despite deleting the extension from the profile.

What was once an all-inclusive download is now a tedious bit-by-bit multiple downloads.

Unnecessarily complex to simply install an antivirus protection.

I tried to uninstall this add-on manually. I followed the steps that Firefox itself suggested. It keeps popping up and reinstalling itself! DO NOT INSTALL IT!!!

Edit:
So, this is how I solved my issue. After I manually uninstalled it, I restarted my computer. It was gone! Solved!