Claude Usage Indicator by Trevor Lewis

Shows your Claude current-session and weekly usage in a compact Firefox popup.Shows your Claude current-session and weekly usage directly in Firefox, with live percentage badges, reset times, and light/dark themes.

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About this extension

Claude Usage is a lightweight Firefox extension that lets you monitor your Claude usage without repeatedly opening the Claude Usage settings page.

The extension displays your current Claude session usage directly in the Firefox toolbar and provides a compact popup showing:

• Current session usage percentage
• Current session reset time
• Weekly all-model usage percentage
• Weekly reset time
• Automatic background refresh
• Manual refresh
• Light and dark interface modes

Claude Usage uses your existing Claude login in Firefox to retrieve usage information directly from Claude. No Claude API key is required.

The extension does not read your conversations, prompts, projects, files, or message contents. It does not include advertising, analytics, telemetry, or third-party tracking.

Usage information is processed locally by the extension and is not sent to the extension developer or any third-party analytics service.

Important: Claude Usage is an independent browser extension and is not affiliated with, endorsed by, or produced by Anthropic.

Developer comments

Claude Usage Indicator is a lightweight Firefox WebExtension built with plain HTML, CSS, and JavaScript.

There is no build process, bundler, transpiler, minification, code generation, remote executable code, or third-party JavaScript library. The submitted extension package contains the complete human-readable source code.

The extension connects only to claude.ai to retrieve the signed-in user's Claude usage information. It displays current-session usage, weekly usage, reset times, and a toolbar percentage badge.

It does not read Claude conversations, prompts, projects, files, or attachments, and it does not include analytics, advertising, telemetry, or third-party tracking.

Usage information and interface preferences are stored locally in Firefox using browser.storage.local.

Claude Usage Indicator is an independent extension and is not affiliated with or endorsed by Anthropic.

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Claude Usage Indicator by Trevor Lewis

Optional permissions:

Required data collection, according to the developer: