Limit the Number of Loaded Tabs in Console
You can now limit the number of tabs that can be loaded Lighting Experience. This will improve memory usage and the scalability of console sessions in LEX (Lightning Experience).
Product Area: Salesforce Overall -> General Enhancements
If you exceed the limit during a console session, this feature unloads your least recently used tabs until your tab limit is met. Unloaded tabs are still visible in your tab navigation, but they only reload their content when you click them.
https://www.asagarwal.com/salesforcespring23-limit-the-number-of-loaded-tabs-in-console/
