Thank you for the link. uBlacklist [1] is a more popular alternative, also featured recently on HN [2]
[1] https://addons.mozilla.org/en-US/firefox/addon/ublacklist/ [2] https://news.ycombinator.com/item?id=29794372
[1] https://addons.mozilla.org/en-US/firefox/addon/ublacklist/ [2] https://news.ycombinator.com/item?id=29794372
[1] https://addons.mozilla.org/en-US/firefox/addon/g-search-filt...
[2] https://pastebin.com/5MPSHv3w