Casper icon

Casper

by Brian T · Tools
Manifest V3 Free
View in Chrome Web Store Data as of 19 Oct 2026

Search the contents of your browsing history fully in-browser.

Users
5
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#262K
#218K among extensions
Version
0.0.1
updated 8 Jan 2025

Users

monthly, 2 years
01429Jan 2025Dec 2025Oct 2026
Latest, 19 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
001Jan 2025Dec 2025Oct 2026
Latest, 19 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 Casper

You read that thing on that website a few days ago, and you've closed your tab. Now you can't seem to find it again. Whether it's a research article on the latest AI development, or a cooking recipe you were browsing, Casper helps you search all the sites you've visited in the past, and it's all in your browser! Nothing leaves your device. How does it work? Casper is your friendly neighbourhood extension, grabbing the contents of the sites you visit, chunking it, generating its embedding representations and storing them in a Postgres WASM living in the browser. Nothing leaves your browser, no API calls at all, other than to download the encoder-only model it needs to generate the learned representations of the chunked contents.

Growth

WindowUsersChangeRatingsRating
7 days+1+25.0%00.00
30 days−1−16.7%00.00
6 months−4−44.4%00.00
1 year−9−64.3%00.00

Version history

1 versions recorded
0.0.18 Jan 2025

Details

Category
Tools
First seen
8 Jan 2025
Size
48.5 MB
Languages
en
Pricing
Free
Extension ID
dglonenfidicobbbhfhgnnhcgcfjkdpn

Permissions and risk

Moderate riskimpact 2, likelihood 2
Site access
https://*/*
Can read and change data on every website you visit.

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