How does the chrome extension listen for double-click events on tags?

I want to double-click the tag to close the current page, but I don"t know how to listen for the double-click event of the tag.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e512f5-45119.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e512f5-45119.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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