Old style JavaScript Alert

By: 길고(달빛)

About this add-on

This add-on will make the JavaScript's alert shown as like in older Firefox versions.

Since v1.2.0, alert.toString(), alert.apply(), etc will continue to work after installing this add-on.

Since v1.3.0, it has an option to prevent the page from creating additional dialogs if it creates two or more alert/confirm dialogs.

Since v1.3.3, no restart required apon installing, but you'll need to refresh the page.

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Release Information

Version 1.3.5
Updated on May 5, 2024


Pale Moon 27.0.0 to 33.*


Public Domain


Add-on Releases (Version History)
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