Is there a limit to the number of addresses can I put into a group of multiple users in my address book?

I have just started using Thunderbird and want to set up a number of list groups in my Address Book so that I can simply click on the list name and the email goes to multiple people.

Is there a limit to the number of addresses that I can put into each group? Or, can I put as many addresses into each group as I want to? Thanks for your answer.