I like this. I generally load links in background tabs while reading through a page, but this could be extended to report on browsing and even suggest links.
The "are you sure you want to leave" alert makes me want to go away and stay away--it is not the helpful "close all open tabs?" from closing FireFox.
Have you considered using the right sidebar instead? Consider having a clean left-leading edge for readability.
Edit: Not to put too fine a point on, but the preload urls show up as visited anchor links (which I may not have read) when I go back to HN. Sometimes bug fixes can suggest a radically new way forward.
The "are you sure you want to leave" alert makes me want to go away and stay away--it is not the helpful "close all open tabs?" from closing FireFox.
Have you considered using the right sidebar instead? Consider having a clean left-leading edge for readability.
Edit: Not to put too fine a point on, but the preload urls show up as visited anchor links (which I may not have read) when I go back to HN. Sometimes bug fixes can suggest a radically new way forward.