How about using Safari to Save As a .webarchive (which saves the images as part of the archive) … then using a quality ad blocker in Safari when opening/reading .webarchive files from Devonthink?
How about using Safari to Save As a .webarchive (which saves the images as part of the archive) … then using a quality ad blocker in Safari when opening/reading .webarchive files from Devonthink?