avast and coupon printer

I have the free avast on windows 10,using mozilla firefox. I like printing online coupons from coupons.com. However avast will not let me,always says it is a threat. How do I get avast to ignore this download. The only way now I can print them is to disable avast. is there a way to fix this?

However avast will not let me,always says it is a threat.
What does the message from avast say? A screenshot would help

If it say URL:Mal it means url or IP is blacklisted

This may be why:

https://screencast-o-matic.com/screenshots/u/Lh/1520205095721-19475.png

You can report a possible false positive to Avast:
https://www.avast.com/false-positive-file-form.php

The error I get is the voice telling me “threat detected”
The verification letters are so hard to read I have had a hard time replying

The error I get is the voice telling me "threat detected"
Do you have a old avast version? Right click avast tray icon and select about
The verification letters are so hard to read I have had a hard time replying
Spam protection first 3 posts

Avast is up to date