External Playlist for YouTube de grad13

Turn the habit of "piling up watch-later videos as browser tabs" into a single playlist you actually play through.

Stash — tabs become the playlist
One toolbar click gathers every YouTube video tab in the current window into the playlist and closes them (the tab you are watching stays open). Videos are stashed in tab order, de-duplicated. Press the icon again anytime to sweep up newly opened tabs.

Bookmark Sync — one playlist on every machine
The playlist is stored as an "External Playlist for YouTube" bookmark folder, so your browser's own bookmark sync carries it between machines — no account, no server. Edits made on another machine show up in the panel by themselves. It survives reinstalls, and keeps a local copy when bookmarks are unavailable.

Playlist — hands-free playback
Each video is a card in the sidebar: click to play, × to remove, drag to reorder; the playing video is highlighted. When a video ends, the next one plays in the same tab. Loop cycles off → all → one (kept in step with YouTube's native right-click Loop), Shuffle re-orders, and the F7 / F9 media keys skip through the playlist (F8 play/pause stays YouTube's). A freshly opened video waits paused until your first click.

Privacy
Everything stays in your browser: no account, no server, no analytics. The only network request the extension makes is fetching video thumbnails from YouTube's image host. Browsing history, cookies, and saved credentials are not read.