The live-search results view had no browser-history entry of its own, so a
player opened over the results sat directly on the feed page entry. Pressing
Back (e.g. the mouse back button over the player) could pop past both the
player and the search in one step, bouncing from the search results to the
normal feed instead of just closing the player.
The search is now a feed sub-view that owns a history entry (history.state._yt):
entering a search pushes it, the popstate handler derives ytSearch from it, and
"Back to feed" pops it. Back now steps player -> search -> feed: the first Back
closes only the player (results stay), the second returns to the normal feed.
A reload drops any stale _yt so the first Back can't resurrect a gone search.
peter
1eb580f6fa