Increase onbeforeunload alerts support
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Vivaldi (and chrome) support
onbeforeunload
alerts, such as this:
However, this alert is only shown when you close a tab.
Firefox instead shows this alert whenever you navigate away from a page that uses this. Be it:
- a tab close
- going to a new URL
I think that vivaldi should show
onbeforeunload
alerts in each of these cases:- a tab close (V currently does)
- going to a new URL (firefox does, chrome sometimes does)
- using the back/forward buttons (neither browser currently does this)
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