Segmented and Live Stream History for YouTube by WrittenWind

See what you've already watched, right on YouTube's seek bar.

This extension quietly tracks which parts of a YouTube video you've
actually played through, and highlights those segments directly on the
video's seek bar the next time you open it. Picking up a long video
where you left off, or skipping straight to the parts you haven't seen
yet, becomes a lot easier.

It works at any playback speed — 0.25x through 2x and beyond — and on
any regular YouTube video.

LIVESTREAMS, TOO
The same tracking runs while a livestream is airing. Once the stream
ends and YouTube turns it into a VOD, your watched segments are already
there waiting — so you can tell at a glance what you watched live versus
what you missed.

FEATURES
• Automatic tracking — no setup required, works as soon as you install it
• Highlights colored directly on YouTube's seek bar
• Pick a highlight color from presets, or enter any hex code
• Optional "only count as watched while the tab is focused" mode (off by
default, so background-tab watching still counts)
• One-click "Clear watched data" to wipe your history at any time

YOUR DATA STAYS ON YOUR DEVICE
Everything this extension tracks is stored locally in your browser using
Firefox's standard extension storage. Nothing is ever sent to a server —
there isn't one. Uninstalling the extension or clicking "Clear watched
data" removes it.

YouTube is a trademark of Google LLC. This extension is not affiliated
with, endorsed by, or sponsored by YouTube or Google.