Public Shared Cache

About

One download, every site.
Public Shared Cache gives every pubkey.cloud site you visit a single, shared library cache. When one site loads a JavaScript module or on-device AI model, the extension stores it once and serves it instantly to every other site that needs the same file — straight from your own machine, with zero bytes back over the network.

Why install it

⚡ Faster page loads. Shared dependencies resolve from local storage in a millisecond or two instead of being re-downloaded per site.
📉 Less bandwidth. The same popular libraries stop downloading over and over. For multi-gigabyte AI models, that's the difference between one download and one per site.
🔒 Verified builds. The extension re-checks that the site you're on is running the exact build its author published — pinned per-asset with Subresource Integrity — and flags anything that doesn't match.
📊 See your savings. A clean popup shows live cache hits, bytes saved per site and overall, and a running savings chart.
🖥️ "Will it run?" for AI models. Before a multi-GB model download starts, the extension checks your GPU and tells you whether it'll run, be tight, or won't fit.

Private and safe by design. The cache lives entirely in your browser's local storage.

Nothing you browse is sent anywhere; the extension only fetches the same public library files the sites would have fetched themselves. It's fully opt-in and does nothing on sites that don't use it — uninstall any time and every site keeps working exactly as before — just slower maybe.

Free, open, and lightweight. Install it and the web's shared building blocks stop downloading twice.