I would like to strongly suggest that browsers implementing the Page 
Visibility guidelines identify themselves by using a X-Page-Visibility (or 
similar) header. This would give webmasters the ability to utilize the 
suggestions put forth in the Page Visibility guidelines with increased 
efficiency. It also would give them the ability to block such requests as 

Suggested attribute and possible values:

X_PAGE_VISIBILITY: (hidden|visible|preview|prerender)

Thank you,

Carter Glass

Reference: http://www.w3.org/TR/2011/WD-page-visibility-20110602/ 

Received on Thursday, 3 November 2011 17:53:08 UTC