DownloadNet reminds me of how I got really started with Perl programming over 20 years ago. Since I was using my parent's land line with a dial-up modem (which cost cents/minute), I wanted to speed up the process of looking for a job via the government's official job search site.

Turns out, on my slow computer it was faster to clean up a megabyte of HTML with regular expressions before giving it to Firefox than just rendering it as-is - by about 30 seconds per search result page.

Perhaps it's possible to sanitize often visited websites with DownloadNet? (currently getting aggravated by reddit hiding images via JS code to prevent download / viewing in another tab...)