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alwaysopenpopup Obsolete since Gecko 1.9.1
Type: boolean
Note: Applies to: Thunderbird and SeaMonkey
If true, the autocomplete popup will be displayed even when there are no matches. If false, the default value, the popup will be hidden. This attribute is obsolete as of Gecko 1.9.1; to control the display of the popup, use the minresultsforpopup attribute instead.