Finding text (and selecting) within a text field

Hi @noisneil - this is looking great! The only thing is, it doesn't seem to be working for me. I get the input box and I can tell it pastes (more entries in my clipboard manager), but the output is the same as the original text (e.g its effectively a copy-paste with extra steps currently). I'm not sure if this is something to do with the permissions on my computer (although I have granted KM all available in Privacy settings). I have trouble with other copy-paste addons just pasting the variable %URL%. Thanks for all your help! Feels like it's nearly there. Once it actually replaces the text, this is the exact function I'm looking for