Add event listener for tab close

mozilla / addon-recommendation-shield-study

Stand-alone verison of Add-on Recommendation for Shield Study

Mozilla Public License 2.0

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Add event listener for tab close #61

Closed casebenton closed 8 years ago

casebenton commented 8 years ago

@Osmose r?

Osmose commented 8 years ago

r+. I was worried about if it's possible for the user to close a tab that isn't the currently-open tab, but I can't find a situation where that happens, so this is probably fine. Nice work!