User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0
Steps to reproduce:
In Options > General > Startup enable "Restore previous session".
Make sure there is only one window and one tab open. (It helps to load a recognisable page.)
Close the tab, thereby closing Firefox.
The previously closed tab is reopened.
The tab should respect that it was closed and Firefox should start a new blank window.
Note that this is similar to, but not the same as https://bugzilla.mozilla.org/show_bug.cgi?id=628043
The priority flag is not set for this bug.
:mikedeboer, could you have a look please?
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