Flip The Coin – Browser Extension

Cannot decide between two options? Flip a coin — without leaving the tab you're on.

The Flip The Coin browser extension puts the same 3D coin from flipthecoin.app one click away in your toolbar. Click the icon, hit Flip the coin, let fate decide.

What it does

• Opens a compact popup (360×460) with the full 3D coin scene.
• A single Flip the coin button triggers the flip with the exact same physics as the web app — we share the animation code between both, so the coin feels identical wherever you use it.
• Shows the result (Heads, Tails, or the occasional Edge) as soon as the coin settles.
• That's it. No tracking, no analytics, no network calls, no permissions.

Prefer to flip without installing anything? Try the coin flip game in the browser — same physics, same coin.

Install

Chromium browsers (Chrome, Edge, Brave, Arc, Opera…)

The extension is available on the Chrome Web Store and works in every Chromium-based browser:

Add to Chrome (and all Chromium browsers) →

Or install from source

git clone https://github.com/paulmelero/flipthecoinapp.git
cd flipthecoinapp
pnpm install
pnpm --filter @flipthecoin/extension build:chrome

Then in Chrome (or any Chromium browser) go to chrome://extensions, enable Developer mode, click Load unpacked, and select apps/extension/dist/chrome/.

Firefox

The extension is available on Firefox Add-ons (AMO):

Add to Firefox →

Or install from source

git clone https://github.com/paulmelero/flipthecoinapp.git
cd flipthecoinapp
pnpm install
pnpm --filter @flipthecoin/extension build:firefox

Then in Firefox go to about:debugging#/runtime/this-firefox, click Load Temporary Add-on…, and select any file inside apps/extension/dist/firefox/.

Privacy

The extension does not collect, store, or transmit any data. It has no permissions and makes no network requests — the 3D scene, the physics, the textures and the fonts are all bundled with the extension. Your flips stay yours.

Fair warning

The coin flip is random and is for entertainment only. Please don't use it to make decisions you'd regret, and see our Privacy Policy and Terms of Service for the rest of the small print.