a9
by jongde.com more by this developer →
#146,422 of 271,543 by installs on Chrome · #89,226 of 164,288 in productivity
First seen by this census 09/01/2026 — the store does not publish a creation date
Last updated 02/23/2026
Tracked since 09/01/2026
Compare with another extension
Category: productivity / workflow
Languages: English, 中文（中国）
Description
A9 Extension
Alternatives to a9
| Name | Users | Rating | |
|---|---|---|---|
Adobe Acrobat: PDF edit, convert, sign tools
by Adobe, Inc.
|
336,000,000 | 4.4 | compare |
迅雷下载支持
by Shenzhen Xunlei Network Technology Co., Ltd.
|
68,000,000 | 2.8 | compare |
AdBlock — block ads across the web
by ADBLOCK, INC.
|
62,000,000 | 4.5 | compare |
Adblock Plus - free ad blocker
by eyeo GmbH
|
40,000,000 | 4.4 | compare |
Grammarly: AI Writing Assistant and Grammar Checker App
by Grammarly
|
39,000,000 | 4.5 | compare |
Chrome Remote Desktop
by Google Ireland, Ltd.
|
38,000,000 | 3.1 | compare |
Google Translate
by Google Ireland, Ltd.
|
37,000,000 | 4.2 | compare |
Microsoft Single Sign On
by Microsoft
|
35,000,000 | 2.2 | compare |
Kami for Google Chrome™
by Kami
|
17,000,000 | 4.6 | compare |
Claude
by Anthropic
|
16,000,000 | 2.8 | compare |
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 | 0 | — | 0 | 1.6 days |
| week | 0 | — | 0 | 8.7 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
- Record the picture and sound of your browser tabs
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
- offscreen — Run a hidden page to do background work, such as playing audio or reading documents
- tabCapture ⚠ — Record the picture and sound of your browser tabs
- tabs — See your open tabs and the pages you're on
- webNavigation — See what pages you navigate to and when