Galleryzer is a free Chrome add-on developed by laxu that creates a gallery view of images on a webpage. This add-on is particularly useful for viewing image threads on forums, as it creates an image gallery out of all the images on the page that are above a certain size, excluding header and banner images.

One of the standout features of Galleryzer is its lightweight design. It doesn't use any additional JavaScript libraries, ensuring a fast and efficient browsing experience. Moreover, Galleryzer is safe to use, as it doesn't inject ads or analytics and doesn't send any data to remote servers.

The add-on is responsive and adjusts its layout between 2-4 columns based on the size of the browser window. It also eliminates duplicate images by checking the image sources, so you won't see multiple instances of the same image in the gallery.

Galleryzer offers a light and dark theme option to suit your preferences. It also includes a lightbox feature that allows you to view images in full size, and it can handle links leading to larger versions of the images.

Additionally, Galleryzer supports showing forum thread page navigation in the gallery and can automatically open the gallery when moving between thread pages, although the level of support may vary based on the forum software you are using.

Overall, Galleryzer is a lightweight and efficient Chrome add-on that provides a convenient way to view image galleries on webpages. Its focus on performance, safety, and responsiveness make it a valuable tool for browsing image threads on forums.