It's unclear why Twitter decided to make its image viewer less user-friendly, but ever since its last redesign, users have been forced to click through recent images, one at a time. Browsing your recent images or those of other Twitter users has become a frustrating experience.
A Chrome extension, called Please bring back photo grid view!, returns the thumbnail view to Twitter. After you've installed the extension, you'll see the familiar strip of thumbnails in Twitter's recent images.
Apparently, Twitter has a download limit of 150 images per hour, but enabling the "Force pic.twitter.com" option attempts to bypass this limit. Keep in mind, however, that loading times may increase greatly with it enabled.
That's it. Now you can finally browse through images (again) on Twitter without having to click through every single image.