You are on point, the extension starts to slightly malfunction if the user starts to resize the browser window vertically. This is because of the assumption tha

You are on point, the extension starts to slightly malfunction if the user starts to resize the browser window vertically. This is because of the assumption that `(window.pageYOffset + window.innerHeight) / document.body.scrollHeight` will approximately equal 1 when the user has scrolled to the bottom of the page (which apparently, is not necessarily the case). Will address this issue ASAP. [1] Thanks for finding an edge case which I did not notice :) 1. https://github.com/kugurerdem/mark-scroll-positions/issues/1 https://github.com/kugurerdem/mark-scroll-positions/issues/1