"Imagus" works on many images here at the Trains Forums! This is nice when hovering your mouse over a model railroad trackplan, or layout pictures, instead of loading an image in another tab.
In addition to this forum -- Imagus also plays nice with websites like YouTube, and many Wiki(s).
Imagus is a "hover over graphic image + video image" add-in for Firefox Browser, and; Chrome, Opera, and Safari. Do see DotTech's Imagus Review with some pictures and general instructions.
Conemaugh Road & Traction circa 1956