User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0 Build ID: 20170622030208 Steps to reproduce: we can see error messages like SecurityError (DOM Exception 18): Blocked a frame with origin "our.domain.com" from accessing a frame with origin "external-tracking.com" . Protocols, domains, and ports must match via a frontend error reporting tool. unfortunately we cannot reproduce those errors but can see that this errors happen a lot in different user agent across certain pages of our customers websites. could the error message provide more information to make chasing the root cause of this error easier? I think about things like... - frame names/ids which are involved - the concrete line of code or operation which triggered the error Actual results: exceptioni occured but not enough information given to reproduce or fix Expected results: more information to ease fixing/reproduce
Component: Untriaged → DOM: Security
Product: Firefox → Core
As this is a security exception, I'm surprised this doesn't have the line of code associated with it. If you click the script name-link on the right side of the dev tools console where you see the message doesn't it open the script to the offending line?
Severity: normal → enhancement
I can see this errors only via our error reporting mechanism. I am not able to reproduce the errors
Priority: -- → P5
Summary: securityerror dom exception: blocked frame xx from accessing yy → securityerror dom exception: blocked frame xx from accessing yy doesn't point at offending line or script
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