Start with Opera
Opera_01_stackexchange.com_sites.png

show picture = only one element of "secure" page
Opera_02_picture_from_stackexchange.com_sites.png

Reload original page
Opera_03_Reload_stackexchange.com_sites.png

Et voilà
Opera_04_Et_voila_stackexchange.com_sites.png

SuperUser.com - before
Opera_05_before.png
SuperUser.com - before

SuperUser.com - after
Opera_06_after.png