Hi VK - I'm not familiar with the issue you're describing, but this isn't the right place to discuss it in more detail -- this bug report has a specific tracking purpose, and it's not the right place for general questions about printing.
If you've noticed a behavior difference between Firefox and Chrome and it seems like a bug, you can file a new bug here:
...with a description of the problem, steps to reproduce the issue, and other relevant details.
You could also try asking in our web-chat channel at https://chat.mozilla.org/#/room/#layout:mozilla.org ; someone there might be able to help. (That channel is mostly focused on Firefox development, but depending on your question, it might be the right place to ask or alert us to an issue.)
Alternately, you could use the "Ask the community" button at https://support.mozilla.org/en-US/products/firefox and someone from the support community may be able to help.