Costco Price Adjuster
by DB Webstore Extensions more by this developer →
#72,193 of 271,478 by installs on Chrome · #14,887 of 41,078 in lifestyle
First seen by this census 09/01/2026 — the store does not publish a creation date
Last updated 11/23/2025
Tracked since 09/01/2026
Compare with another extension
Category: lifestyle / shopping
Languages: English
Description
Track Costco Price Changes and Get a Refund for the Difference!
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Growth
Change in installs. This store publishes the count rounded to one or two significant figures, so it does not move when the listing grows - it moves when the rounding rolls over. The figures below are therefore what was actually observed between the two crawls named in "measured over", not scaled to the window, and the percentage is of that same rounding step - so a small listing crossing a bucket shows a very large one. A window needs a full period of history before it reports anything.
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | Not enough history yet | |||
| month | Not enough history yet | |||
| year | Not enough history yet | |||
History
Users
Ratings
Average rating
Permissions
Access level: Broad — Reaches every website you visit, or holds a powerful capability.
- Reads and changes your data on specific sites
- See the web requests your browser makes, including URLs you visit
Ad blockers, password managers and VPNs need this kind of access to do their job. This describes what the extension can reach, not how it behaves.
Manifest V3
Reads and changes your data on specific sites
- alarms — Schedule its code to run at a later time
- declarativeNetRequest — Block or modify web requests using a predefined rule set
- scripting — Run scripts on web pages you visit
- storage — Save its own settings and data locally
- tabs — See your open tabs and the pages you're on
- webRequest ⚠ — See the web requests your browser makes, including URLs you visit