Customaise: AI Userscript & Agentscript Manager. Powered by MCP & WebMCP
#88,184 of 263,655 by installs on Chrome · #52,408 of 162,012 in productivity
First seen by this census 09/01/2026 — the store does not publish a creation date
Last updated 09/11/2026
Tracked since 09/01/2026
Compare with another extension
Category: productivity / developer
Languages: English
Description
Custom programmable tools for every open tab. For you, or for your AI.
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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 | -4 | — | -4 | 1.1 days |
| week | -17 | — | -17 | 8.5 days |
| month | Not enough history yet | |||
| year | Not enough history yet | |||
History
Users
Permissions
Access level: Extensive — Reaches every website you visit, and holds a powerful capability as well.
- Reads and changes your data on all websites
- Read and change your cookies, which can include login sessions
- Attach to your tabs' debugger, giving it deep access to page content and network traffic
- Run user scripts - code that did not ship with the extension - on the pages 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 all websites ⚠
- activeTab — See the page you're currently viewing, only when you click the extension
- alarms — Schedule its code to run at a later time
- clipboardWrite — Write to your clipboard
- contextMenus — Add items to your right-click menu
- cookies ⚠ — Read and change your cookies, which can include login sessions
- debugger ⚠ — Attach to your tabs' debugger, giving it deep access to page content and network traffic
- downloads — Start downloads and see your download history
- identity — Get your basic account/profile information for sign-in
- notifications — Show you desktop notifications
- offscreen — Run a hidden page to do background work, such as playing audio or reading documents
- 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
- unlimitedStorage — Save an unlimited amount of its own data locally
- userScripts ⚠ — Run user scripts - code that did not ship with the extension - on the pages you visit
- webNavigation — See what pages you navigate to and when
Version history
| Version | First observed |
|---|---|
| 1.3.4 | 09/12/2026 |
| 1.3.3 | 09/06/2026 |
| 1.3.2 | 09/04/2026 |