Marginalia

by Johnwalker721@gmail.com · Tools

Manifest V3 Free

View in Chrome Web Store Data as of 17 Oct 2026

AI reading partner that observes how you read, then opens a conversation with an observation, an insight, and one question.

Users

0 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#302K

#246K among extensions

Version

1.1.0

updated 19 Jun 2026

Users

monthly, 4 months

Latest, 17 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months

Latest, 17 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Marginalia

Marginalia is an AI reading companion. It observes how the user reads the current page (dwell time, scroll speed, engagement) and, on request, opens a sidebar conversation that returns an observation, an insight, and one question about what they were reading — using the user's own Anthropic API key.