error logged when double clicking on Fx window title bar

[al_9x]

xp, Fx 16.0.2, NS 2.6, new profile

maximizing or restoring

Error: TypeError: el.ownerDocument is null
Source File: chrome://noscript/content/noscriptOverlay.js
Line: 2547

[Tom T.]

Confirmed. Also:
After clicking to smaller size, I also got

Timestamp: xxxxxxxxxxx (for privacy)
Error: this.docShell is null
Source File: chrome://global/content/bindings/browser.xml
Line: 323

Restoring to full size brought also

Timestamp: xxxxxxxxxxx
Error: TelemetryStopwatch: key "FX_SESSION_RESTORE_COLLECT_DATA_MS" was already initialized
Source File: resource://gre/modules/TelemetryStopwatch.jsm
Line: 53

[maxmaster]

Still happening, Firefox 22, NoScript 2.6.6.7:

Tue Jul 09 2013 11:32:56
Error: TypeError: el.ownerDocument is null
Source file: chrome://noscript/content/noscriptOverlay.js
Line: 2552