Scribd Enhancer with OCR, TXT/HTML export, Snapshot PDF (pixel-perfect), Rich HTML (images inlined), page-range + quality controls. Pleasant "Dark Box" UI + floating gear. Toast notifications. Rich HTML de-duplicates layered text/image. + External Downloader button.
The unblurring and scraping functions work very well.
OCR and export to txt can save tons of time if you are taking your own notes.
Easily accessible and does not alter the page much.
Simple but visually appealing UI design.