Hey so you’ll need a userscript addon to use this (e.g. greasemonkey, tampermonkey). It’s very rough and I’ve only tested on firefox but if you’re a developer feel free to use this code and make improvements. Here’s the mind boggling list of features:

• Collapse comments: adds a button to collapse a comment tree, click the comment again to show the tree

• Show images: Clicking an image on the right shows a full sized thumbnail below the post, also click and drag it to resize the image. Please note this only works on the main feed (not in the post itself), also it’s not the full resolution image.

Not sure if anyone else has made something like this but if they have let them know, maybe they’ll want to use the code.