Intensive searches in FileMaker can be slow and slows down other users too.
We could have non-blocking find, that will run in background. It will display small progress bar in status area with number of records currently found (button/link). When user clicks on records, it will stop find and show only found records.
progress bar number of records found (incrementing) button
[### ] 4 records found... [Cancel]
I don't know if the search in FileMaker is transactional (all records checked for change during operation) - if yes, there should be an option to disable it.