showCommentColumn Obsolete since Gecko 1.9.1
Type: boolean
If true, a comment column appears in the popup. For the URL history, the comment column will contain the page titles associated with each URL. If this attribute is not specified, the comment column doesn't appear. As of Gecko 1.9.1, this attribute is now always specified in lower case.

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 Contributors to this page: Sheppy, trevorh, Neil
 Last updated by: Sheppy,