SkimFast opens any X (Twitter) post's full reply thread in a popover, right over your timeline — one click, read the whole conversation, then keep scrolling. No opening the post in a new tab and clicking back. Real nested reply chains, sort by Top or Latest, jump to the most-liked reply, drill into any branch, inline images and video, and it auto-matches your X theme. Private and local — no servers, no tracking.