Note for me: 1. Desktop Notifications spec says "resident" is the hint to control this. 2. The relevant code in Gecko is [nsAlertsIconListener::ShowAlert](https://searchfox.org/mozilla-central/rev/85679f95a634d08307e115fb365ea287198bd4d2/toolkit/system/gnome/nsAlertsIconListener.cpp#157). (Why is this in `toolkit/` when every other nsIAlertsService implementation is in `widget/`?)
Bug 1417846 Comment 4 Edit History
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Note for me: 1. Desktop Notifications spec says "resident" is the hint to control this. https://specifications.freedesktop.org/notification-spec/notification-spec-latest.html 2. The relevant code in Gecko is [nsAlertsIconListener::ShowAlert](https://searchfox.org/mozilla-central/rev/85679f95a634d08307e115fb365ea287198bd4d2/toolkit/system/gnome/nsAlertsIconListener.cpp#157). (Why is this in `toolkit/` when every other nsIAlertsService implementation is in `widget/`?)