There is also JPEG View which is really fast and simple image viewer for windows https://github.com/sylikc/jpegview) It is very fast, specially noticeable on very large images. - Source: Hacker News / 3 months ago

JPEGView - lightweight image viewer for Windows. ShareX - screen capture tool with other nice features. Source: about 2 years ago

JPEGView should be close enough to what you want. It's very light-weight. Source: about 2 years ago

JPEGView is great, lightweight and opens stuff fast https://sourceforge.net/projects/jpegview/. Source: about 2 years ago

JPEGView - Lean and fast image viewer with minimal GUI. Source: about 2 years ago

Lightbox (which was easier to implement) and. Source: 7 months ago

That fix would require a major adjustment in the lightbox code. Honestly I would consider just switching the lightbox plugin you use. This here seems to have the same functionality as yours: https://lokeshdhakar.com/projects/lightbox2/. Source: about 1 year ago

Possibly https://lokeshdhakar.com/projects/lightbox2/. Source: over 1 year ago

Are you taking about coding it yourself? I just attempted to quickly make a lightbox the other day as I thought it’s a relatively simple thing. I soon realised there’s actually a fair amount going on. I ended up using lightbox2 and then slightly modifying it to suit how I wanted it. Source: almost 2 years ago