Online Privacy-Protected Synthesizer (OPPS) icon

Online Privacy-Protected Synthesizer (OPPS)

by sambuxbaum · Privacy & Security
Manifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

OPPS: A non-profit, privacy-focused extension by Washington University & Boston University, ensuring secure, anonymous web research.

Users
19
−6 in 30 days
Rating
4.5 / 5
unchanged in 30 days
Ratings
4
0 in 30 days
Store rank
#152K
#126K among extensions
Version
1.2.1
updated 20 Dec 2024

Users

monthly, 2 years
01,5003,000Jul 2024Sep 2025Oct 2026
Latest, 15 Oct 2026: 19 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
024Jul 2024Sep 2025Oct 2026
Latest, 15 Oct 2026: 4 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 Online Privacy-Protected Synthesizer (OPPS)

The Online Privacy-Protected Synthesizer (OPPS) browser extension is designed to collect and privacy-protect web browsing data for analytical purposes by researchers at Washington University in St Louis and Boston University. https://op-ps.org/ OPPS is completely non-profit. We do not sell data or make money from your data. Indeed, we neither collect individual data nor can we see individual data. Our top priorities are privacy and security: all collected data is encrypted and analyzed anonymously at an aggregated level. The OPPS extension has been engineered with robust measures to ensure that personal information remains private and secure, aligning with our commitment to user privacy and data protection standards. Further details on our state-of-the-art privacy protection are available on the project website at https://op-ps.org/ OPPS requires a Mechanical Turk Worker ID to process payment; however, the ID is not connected to individual browser data. If you would like to participate but do not yet have a Mechanical Turk ID you can sign up on Amazon at https://www.mturk.com/worker OPPS has approval from the Institutional Review Board (IRB) at Washington University (ID# 202312041). If you are concerned about your rights as a research participant, you can contact the Human Research Protection Office at Washington University at https://hrpo.wustl.edu/about-us/contact-us/ or by calling 314-747-6800. For transparency, the source code of the plugin is available at https://github.com/sambux1/opps-client. Please see the project website for further details: https://op-ps.org/

Growth

WindowUsersChangeRatingsRating
7 days−7−26.9%00.00
30 days−6−24.0%00.00
6 months−15−44.1%00.00
1 year−10−34.5%00.00

Chrome Web Store search rankings

Where Online Privacy-Protected Synthesizer (OPPS) appears when people search the store, with the 30 day change
Search phrasePosition30 days
data privacy#55+19

Version history

8 versions recorded
1.2.120 Dec 2024
1.2.020 Sep 2024
1.1.16 Aug 2024
1.1.05 Aug 2024
1.0.326 Jul 2024
1.0.218 Jul 2024
1.0.114 Jul 2024
1.0.011 Jul 2024

Details

Category
Privacy & Security
First seen
11 Jul 2024
Size
31 KB
Languages
en-US
Pricing
Free
Privacy policy
op-ps.org
Extension ID
mbjlebabbgmhpoopkkpkmmnobajncdnf

Permissions and risk

Moderate riskimpact 3, likelihood 1
Permissions
storagehistorywebRequest
Site access
<all_urls>*://*.op-ps-data.org/*
Can read and change data on every website you visit.

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