Enlarges the thumbnails and makes them high-resolution.
Grays-out visited links (since the site removed that).
Brightens the other links (since otherwise they blend in with the background).
Changes the default links to lead to the all-pages versions of the chapters.
Increases the amount of text shown next to the thumbnails, to fit larger names and more chapter numbers.
Makes the page buttons clickable on their entirety (previously just the numbers were clickable).
Increases the maximum amount of pages for the Latest Releases, showing the currnet page, 3 previous pages, and 3 forward pages, as well as the option to skip 10, 50, or 100 pages in both directions.
I edited out the ads in the screenshots, to accentuate the changes the userscript makes.