I hate it when some sites appear again and again within my google (or any other search engine) list.
For instance, you may go to google image search and type in "samurai soldier with sword". The results list is infected with sites trying to sell you such images. You can combat this by adding their names preceded by a minus sign every time you do a search. But the list can become enormous, and repeating the process every time is really annoying, tiring, and time consuming:
"samurai soldier with sword" -depositphotos.com -graphicleftovers.com -123rf.com
Is not there any free firefox plugin or something that allows me to add "123rf.com" just once and for all in some kind of filter list, and from that moment never see it again in any of my future search results, as if the site had been completely wiped out of existence?