Comment 4 for bug 1836178

There have been some major changes to the close confirmation dialog box since 5.1.2 was released, and there was an issue with the default button selection in 5.1.2 that should now be fixed. @Alexander, can you try the nightly build to see if that fixes it?

@Jeff, the code you are looking at was only added recently (commit 8002692f3ece830e6673e8b3bedfd614379b791e), before that Seth commited a fix for the button defaults in 5d5422b4c53cff9380efd7de91e109920ac05b1e that addressed this issue.