Ability to switch to next/prev image with arrow keys

Please add the ability to dynamically switch to the next/prev image with arrow keys. There is some album functionality, but looks like it is tied to predefined websites. Thanks.

This functionality was always present when viewing galleries and it works for me. Which sites don't work for you?

For me personally when I click left/right arrow keys nothing happens. I am talking about using it not only with sites where the script detects galleries, but any image sets. When the user presses the right arrow key on the site with no gallery detected, the script should find the closest next image that can be enlarged and show its popup. This will be very universal. This will work with almost all imageboards, boorus and so on at once.

Guess I will write an userscript-extension for this. Maybe you will include this functionality in your great script.

I doubt I'll implement it because it doesn't seem trivial and many sites need complex rules, there may be also false positives for auxilliary images like avatars, icons. The idea is interesting though, so I'm keeping it open.

The structure of the parent DOM elements of the popped up image should be similar to the next one. Image size should also be checked if possible.