Last updated: 31 October 2026
Tempo doesn't collect, sell or share any personal data. It has no servers, no analytics and no ads.
The address of the page you're on, to decide which of your speed settings applies.
On YouTube, the current video's category, channel name and title, to tell whether it's a music video.
Tempo uses this on the spot inside your browser. It never saves it or sends it anywhere.
Your settings: your speeds, on/off switches and the sites on your allowlist or blocklist. They live in your browser's extension storage. If you have browser sync turned on, your browser syncs them through your Firefox or Google account, like other extension settings. Tempo never receives them.
While a tab is open, its current speed, so the toolbar popup can show it. This is cleared when the tab or the browser closes.
The heart button and "Support Tempo" card open ko-fi.com in a new tab. Ko-fi's own privacy policy covers anything you do there.
Use the Ko-fi page at https://ko-fi.com/spareminutelabs.