If you aren’t using Ancestry.com’s advanced viewer yet you need to see the results I got when I tested it—sorry, no support for Mac browsers. As the chart below shows, an image that took 21.9 minutes to load with the standard viewer on Internet Explorer 8 took only 6.9 minutes when using the advanced viewer. Firefox did even better, loading the same image in only 1.7 minutes with the advanced viewer. The test image was a 1920 census page at 200% resolution.
The accompanying video will show you, click-by-click, how to install the advanced viewer. It will also demonstrate the features you can use once you have it installed.
Another big bonus of using the advanced viewer is that you can change which resolution you’re viewing and only download the image once.