Click the "Download" button on the official repository site.
> MozTool will now optimize itself. Confirm download of update? (y/n)
Downloading MozTools or similar browser extensions typically involves a straightforward process:
Navigate to the official Mozilla Add-ons website or Moz's website to find the tool you're interested in.
Someone else had MozTool. And they weren't fixing the web. They were breaking it.
Ensure you are downloading an .exe or .dmg file, not a fake .scr or .vbs file.