Hi,
Mozilla has disabled my previous ad and privacy blocker on Firefox Quantum 66.0.3 (64-bit) for Windows. So I found malwarebytes browser extension using the link you provided.
However, I could not download this beta version of the extension directly from Firefox Add-Ons webpage. I keep getting the error " Download failed. Please check your connection."
My wifi connection is working perfectly fine and is still connected to the internet so I don't know what the real issue is.
Is there another way of downloading the Malwarebytes browser extension from another download site?
Or is it not available to the general public?
Thanks for your help...