User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 Build ID: 20160208194709 Steps to reproduce: Try it http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_onunload Actual results: It doesn't work Expected results: It has to show an alert popup
Status: UNCONFIRMED → RESOLVED
Last Resolved: 3 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 681636
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