Sleazy Fork is available in English.
Adds a few quality of life improvements on Sankaku Channel: Automatic image scaling, scrolling to image, thumbnail icons for loud/animated posts, muting/pausing videos, + - tag search buttons, a tag menu which allows for tagging by clicking, 'Choose/Set Parent' modes, easier duplicate tagging/flagging. Fully configurable through the Addon config.
The "Fade out thumbnails of viewed posts" doesn't work, it does nothing regardless if its on or off.