Cove is a calm, local-first Manifest V3 new tab extension for Firefox. It replaces the new tab with a workspace, a ranked newsroom, an offline reader, a Pomodoro timer, and procedural focus sound — 166.2 KB gzipped, zero runtime dependencies, no account, no analytics, no server. Data stays in chrome.storage.local and IndexedDB. One click from Firefox Add-ons. Open source, Apache-2.0.

Fact Cove (v0.1.3, checked 29–31 Oct 2026)

Stack Svelte 5 + TypeScript + Vite 6 + Tailwind CSS 4, Manifest V3

Size 166.2 KB gzipped (141.0 KB JS + 25.2 KB CSS), CI-enforced 170 KB budget

Dependencies Zero runtime dependencies

Tests 66 unit tests + 2 integration audits

Storage chrome.storage.local + IndexedDB, JSON export/import

Privacy No account, no analytics, no tracking, full network ledger in repo

Browsers Firefox (Add-ons, one click); Chrome, Brave, Arc, Edge, Zen (manual install)

Licence Apache-2.0 — github.com/DevAnimecx/cove

Why 300 downloads didn't stay

The first post about Cove got 7,400 views and about 300…