I was looking for exactly such an extension, to make browsing on my Onyx Boox ebook-reader more enjoyable.

The page up / page down by touch to avoid scrolling on a e-ink display works as promised.

Unfortunately the "makes text bold" function, is way to intense and brakes the layout of the webpage.

Since you can't modify the functions or deactivate parts of it, the extension is not usable for me .