[erikbye]

For google you can use this https://addons.mozilla.org/en-US/firefox/addon/g-search-filt..., just drop in your list of those 500 URLs, once you've decided on what the top 500 is.

For other engines you can use https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/ with this script https://greasyfork.org/en/scripts/1682-google-hit-hider-by-d...

[atrudeau]

For Chrome: https://chrome.google.com/webstore/detail/google-search-filt...

[terrycody]

really nice, thx for share!