I do this with a bit of CSS: /* Pay-Wall Domains */ a[href^="https://www.ft.com/" https://www.ft.com/"]::after, a[href^="https://www.newscientist.com/" https

I do this with a bit of CSS: /* Pay-Wall Domains */ a[href^="https://www.ft.com/" https://www.ft.com/"]::after, a[href^="https://www.newscientist.com/" https://www.newscientist.com/"]::after, a[href^="https://www.telegraph.co.uk/" https://www.telegraph.co.uk/"]::after, a[href^="https://www.thetimes.co.uk/" https://www.thetimes.co.uk/"]::after, a[href^="https://www.wsj.com/" https://www.wsj.com/"]::after { color: rgba(128,0,0,0.75) !important; content: " $ " !important; } I imagine there are loads more pay-walled domains here, but these are the ones I've seen frequently... If it's not obvious, this places a red dollar sign after any links to the listed domains.