[SalesForce] Developer console in chrome will hang if I left lightning component open last time

To set up perspective you need to load some log first:

Then click on the "Perspective All" button and then navigate to "View Panels". Turn some off and save new perspective as "New one".

By the way you can use for example Force.com IDE too:

The new Tooling API has the ApexExecutionOverlayAction object.

Specifies an Apex code snippet or SOQL query to execute at a specific line of code in an Apex class or trigger and optionally generate a heap dump.

You could use this to capture the heap dump for the required user.

Specifically, try setting:

• ActionScriptType to 'None'
• ExecutableEntityId to the Apex class Id
• ExpirationDate to some time in the future. Maybe an hour out
• IsDumpingHeap to true
• Iteration to 1
• The Line to "The line number of the heap dump marker"
• the ScopeId to the required UserId

I hacked something together in a .NET to try it out.

SforceService toolingService = // Get an instance of the ToolingService

string apexClassId = "01p70000CLASSID";

// This is the session owners UserId
//string heapUserId = "005700000000FOO";
// This is an Id of another user in the Org
string heapUserId = "005700000000BAR";

int heapDumpLine = 27;

ApexExecutionOverlayAction apexExecutionOverlayAction = new SalesforceTooling.ApexExecutionOverlayAction();
apexExecutionOverlayAction.ActionScriptType = "None";
apexExecutionOverlayAction.ExecutableEntityId = apexClassId;

apexExecutionOverlayAction.IsDumpingHeap = true;
apexExecutionOverlayAction.IsDumpingHeapSpecified = true;

apexExecutionOverlayAction.Iteration = 1;
apexExecutionOverlayAction.IterationSpecified = true;

apexExecutionOverlayAction.Line = heapDumpLine;
apexExecutionOverlayAction.LineSpecified = true;

apexExecutionOverlayAction.ScopeId = heapUserId;

SaveResult[] results = toolingService.create(new sObject[] { apexExecutionOverlayAction });
SaveResult triggerSaveResult = results[0];
if (!triggerSaveResult.success)
{
    Assert.Fail(triggerSaveResult.errors[0].message);
}
Assert.IsTrue(triggerSaveResult.success);

Note that this didn't make the Heap Dump Location appear in the developer console for the session owner. I logged in as the target user, but it appears I've broken the developer console for that user:

However, after hitting the dump point you can pull the resulting dump out from the ToolingService using the ApexLog. E.g.

QueryResult apexdumpLogResult = toolingService.query("Select Id, Application, DurationMilliseconds, Location, LogUserId, Operation from ApexLog where Location = 'HeapDump'");