Jira
Both Jira Cloud and Jira Server are supported.
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Both Salesforce Classic and Lightning Experience are supported.
Connector for Salesforce & Jira requires installation of an AppExchange-certified managed package. This is a managed package so it will not be pushed automatically to Professional Edition instances but Salesforce API access for this Connector will be automatically enabled in the organization.
Jira next-gen projects are currently not fully supported.
APEX Triggers cannot be developed on Professional Edition, instead develop the code in Developer Edition and deploy it to Professional Edition, see https://help.salesforce.com/s/articleView?id=000323569&type=1 for further details.
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