Tempo — Video Speed Control by Colin Knapp

Tempo does one job quietly: it changes YouTube playback speed without opening a menu.

• Press ] to increase speed by 0.25×.
• Press [ to decrease speed by 0.25×.
• Press \ to reset speed to 1×.
• Keep one preferred speed across videos, in-page YouTube navigation, and Firefox restarts.
• See a brief inline speed indicator after each change.

Tempo ignores its shortcuts while you type in an editable field. Speeds are normalized to 0.25× steps and remain between 0.25× and 4×.

The saved speed stays in Firefox's local extension storage. Tempo has no accounts, telemetry, analytics, tracking, remote code, or network requests.

Tempo is an independent product published by Colin Knapp. It is not affiliated with or endorsed by YouTube or Google.