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A private pre-CRM notebook for manual prospect research. Save context, follow-ups, and templates locally in Chrome. Signal Notebook is a private pre-CRM notebook for manual prospect research. It helps you save why a prospect mattered before the context disappears. Paste a note, profile snippet, source URL, email signature, or research detail into the extension, review the prospect card, and save it locally in Chrome. It is designed for solo founders, freelancers, indie hackers, job seekers, and anyone doing lightweight manual outreach before a contact is ready for a full CRM. What you can do: - Save prospect cards from text or URLs you manually provide - Capture why someone seemed relevant, where you found them, and what to do next - Organize prospects by status, tags, notes, and follow-up date - Review prospects in a list, pipeline board, and follow-up view - Create reusable message templates and copy a preview to your clipboard - Export saved prospects as CSV - Export and restore a local JSON backup Privacy and safety: - Data is stored locally in this browser with chrome.storage.local - No account required - No AI features - No content scripts - No host permissions - No automatic webpage reading or page modification - No automatic scrolling, clicking, messaging, or form filling - No prospect data is sent to a server Signal Notebook only stores the text, URLs, notes, and prospect information you manually enter.
Jun 7, 2026
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.