SmoothBoost intercepts blocking scroll listeners, skips offscreen canvas draw calls, pauses background videos, and reduces battery drain across desktop and mobile browsers.
Latest release: v2.2.0 • Verified across 61 automated tests
Detected: Chrome • Also for Titanium Android, Helium and Firefox
View Device Installation Guide →
Passive scroll listeners, offscreen canvas draw throttling, and background video pausing built directly on web platform standards.
Select a profile to inspect its active browser flags, listener behavior, and runtime safeguards.
Idle heuristics classify page structure to protect interactive editors while accelerating general web browsing.
Test the difference in scroll responsiveness below. Scroll both panes on your device to observe frame timings.
Simulates synchronous wheel and touch listeners that block scroll dispatch until JavaScript calculations complete.
Enforces passive listener registration. The compositor thread updates scroll offsets immediately without waiting for JavaScript.
SmoothBoost applies concrete web platform optimizations without altering application logic or injecting external frameworks.
Wraps window and document addEventListener calls for wheel and touch events with { passive: true }. This permits the browser compositor thread to scroll immediately without waiting on main-thread execution.
Attaches an IntersectionObserver to HTML5 <canvas> elements. 2D rendering contexts skip expensive draw operations while positioned outside the active viewport, conserving GPU fill rate.
Identifies background, muted, autoplaying promotional videos positioned offscreen and pauses their playback. Automatically resumes playback when the user scrolls them back into view.
Inspects declared @font-face rules via the CSS Object Model and updates their descriptor to font-display: swap. Eliminates invisible text (FOIT) during web font downloads.
Replaces high-overhead CSS backdrop-filter: blur() declarations with clean semi-opaque solid panel colors, removing multi-pass GPU composition bottlenecks on low-power devices.
Scans structural DOM markers during browser idle intervals. Interactive tools such as Google Docs, Figma, Canva, and WebGL game engines are detected and exempted from canvas throttling.
Aggressive optimizations that break production software are useless. SmoothBoost isolates productivity tools, editors, and maps from unsafe overrides.
Design editors and spreadsheets rely on multi-buffered offscreen canvases to pre-render layers, fonts, and vector paths. SmoothBoost detects these applications and ensures draw calls are never intercepted.
Scans for known editor markers (e.g. .kix-appview, [data-testid="stage"]) at idle timing.
Canvases not attached to the visible document DOM are treated as computation buffers and preserved completely.
Classifications are retained in a 500-host LRU cache with a 7-day TTL, preventing unbounded memory growth.
SmoothBoost automatically tags hostnames matching editor patterns. Even under Turbo mode, drawing pipelines on Figma or Google Docs run at standard browser frequency.
Browser games frequently use requestAnimationFrame render loops that must not be clamped arbitrarily without user consent.
WebGL and WebGL2 contexts are recognized; draw calls remain uninhibited while game canvas is active.
Frame rate caps (30 FPS limiter) apply only when explicitly toggled in Custom or Battery Saver profiles.
WebGL games and 3D scenes continue to render at your display's full native refresh rate (60 Hz / 120 Hz / 144 Hz).
Interactive maps and pinch-to-zoom widgets call event.preventDefault() to stop the whole page from scrolling while zooming the map.
Identifies .gm-style, .mapboxgl-canvas, and map viewport elements.
Preserves non-passive event listeners inside map containers so pinch-to-zoom and wheel zoom function properly.
Tested directly against Google Maps and Leaflet tiles. SmoothBoost speeds up page scroll without disabling map zooming.
Production builds available for desktop and mobile Chromium and Gecko engines.
Built for Manifest V3 on Chromium. Operates via service worker background lifecycle and native tab discard controls.
Download the distribution ZIP file below and extract it to a local folder.
Navigate to chrome://extensions (or helium://extensions) and enable Developer mode.
Click Load unpacked and select the unzipped directory containing manifest.json.
Tailored for mobile Chromium on Google Play. Features touch-friendly tap targets (≥44px), guarded desktop APIs, and Android memory pressure handling.
Install Titanium Browser from Google Play on your Android phone or tablet.
Download the Titanium Android ZIP build directly to your mobile device.
Open Titanium Browser menu → Extensions, toggle Developer mode, and load the extension.
Gecko MV3 compliant build utilizing background event pages and Firefox 128+ execution models.
Download the Firefox distribution archive below and unpack it.
Navigate to about:debugging#/runtime/this-firefox in Firefox.
Click Load Temporary Add-on... and select the manifest.json inside the unzipped folder.
GeckoView mobile extension target configured for Firefox Nightly or developer collections with mobile touch guards.
In Firefox Nightly for Android, navigate to Settings → About Firefox Nightly and tap the logo 5 times.
Download the Firefox Android ZIP package below.
Deploy using USB debugging via web-ext run --target=firefox-android or your Custom Add-on Collection.
Directly synchronized with published releases on GitHub.
Answers regarding security, implementation mechanisms, and browser compatibility.
preventDefault() is invoked. SmoothBoost intercepts these registration calls at document start and declares them passive, enabling the browser compositor to update scroll offsets on the GPU thread without blocking.
content-visibility: auto to deep offscreen DOM nodes (omitting top-level containers), pauses idle canvas rendering loops, suspends ambient promotional video playback, and throttles non-interactive animations, significantly reducing CPU wakeups and GPU draw time.