When opening the Salesforce Developer Console, the browser may freeze and display the following error (wording varies by browser):
"A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue."
This error is caused by a corrupted or oversized IDEWorkspace record associated with the user's Developer Console session. IDEWorkspace stores the Developer Console's open tabs, query history, and layout preferences. When this record becomes too large or corrupted, the Developer Console fails to load, causing the browser to freeze.
Resetting the IDEWorkspace for the affected user clears the corrupted session data and restores normal Developer Console functionality.
?q=SELECT%20Id%2C%20Name%2C%20Content%20FROM%20IDEWorkspace%20WHERE%20Id%3D%27[ID_VALUE]. Copy the ID value from this URL — it is the IDEWorkspace record ID for the affected user's session./services/data/v40.0/tooling/sobjects/IDEWorkspace/[YOUR_IDEWORKSPACE_ID] — replace [YOUR_IDEWORKSPACE_ID] with the ID copied in step 5.
Note: Workbench is a third-party developer tool and is not officially supported by Salesforce. If you prefer to avoid Workbench, perform the IDEWorkspace DELETE request using Postman or another REST API client with the Salesforce Tooling API.
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