Volume Booster

Boost any tab's volume up to 600% with a single slider. Volume Booster raises the gain on the audio and video already playing in the page, so the change is instant. No page reload, no restart, nothing to set up: drag the slider and you hear the difference straight away. WHAT YOU GET • Volume from 0% to 600%, with a snap back to 100% • Works immediately on tabs that are already open and playing • Keyboard shortcuts (Ctrl+Shift+Up / Ctrl+Shift+Down) that keep working in fullscreen, where the toolbar and the popup are out of reach • A badge on the icon showing at a glance which tabs are boosted • The level follows the tab across page changes, so switching video or episode keeps your setting • Reaches players embedded in third-party iframes, the way most streaming sites build their pages FULLSCREEN SAFE Volume Booster never captures your tab. Extensions built on tab capture can stop a page from entering or leaving fullscreen, because the browser pins the tab's rendering surface while a capture is running. This one works on the page's own media elements instead, so fullscreen behaves exactly as it would without the extension installed. PRIVACY No accounts, no tracking, no analytics, no servers. The extension makes no network requests of any kind. The only thing it stores is the volume level of your open tabs, kept in session storage and discarded when you close the browser. GOOD TO KNOW Past roughly 300%, audio that was already loud can clip. That is what amplification does, not a fault in the extension. On the few sites that serve media from an external domain without CORS headers, the browser's audio engine returns silence rather than a boost; set the slider back to 100% and the sound comes straight back.