Permission · alarms

What the alarms permission means for a Chrome extension

Live Chrome Web Store extensions that declare alarms: 38 268, which is 14% of the 270 886 whose permissions we have read. Counted after our catalog pass of 2026-10-10.

What it lets an extension do

Schedule work to run later alarms

Routine for an extension

Routine for an extension: on its own it does not reach your browsing data or the pages you open.

What Chrome says when you add one

We know of no install warning Chrome shows for this permission on its own. Chrome may still warn about the site access an extension declares alongside it.

How common it is in each category

How common it is in each category
Category	Share of extensions	Extensions
Lifestyle · Well Being	36%	1 040 of 2 878
Lifestyle · News	29%	472 of 1 631
Make Chrome Yours · Privacy	26%	1 398 of 5 449
Productivity · Workflow	19%	8 512 of 45 728
Lifestyle · Shopping	18%	1 604 of 8 710
Productivity · Communication	18%	1 263 of 7 120
Lifestyle · Travel	16%	139 of 855
Lifestyle · Social	15%	1 063 of 7 160
Productivity · Tools	14%	15 126 of 106 524
Productivity · Education	14%	1 579 of 11 519
Lifestyle · Entertainment	13%	821 of 6 364
Lifestyle · Household	11%	54 of 492
Productivity · Developer	9%	2 656 of 28 347
Lifestyle · Fun	8%	649 of 8 489
Make Chrome Yours · Functionality	7%	833 of 11 127
Make Chrome Yours · Accessibility	7%	527 of 8 075
Lifestyle · Games	5%	369 of 6 897
Lifestyle · Art	5%	163 of 3 521

Counted over the live extensions of each category after our latest full pass of the store. A share is context, not a verdict: what is normal depends on what the extension is for.

Widely installed extensions that ask for it

Adobe Acrobat: PDF edit, convert, sign tools Access to every site · 15 permissions, 1 site pattern 344.0M users ★ 4.4
AdBlock — block ads across the web Access to every site · 11 permissions, 1 site pattern 65.0M users ★ 4.5
Adblock Plus - free ad blocker Access to every site · 10 permissions, 1 site pattern 40.0M users ★ 4.4
uBlock Origin Lite Access to every site · 8 permissions, 1 site pattern 21.0M users ★ 4.5
360 Internet Protection Access to every site · 9 permissions, 1 site pattern 19.0M users ★ 4.5
Read&Write for Google Chrome™ Access to every site · 13 permissions, 1 site pattern 19.0M users ★ 3.4
Claude Access to every site · 16 permissions, 1 site pattern 18.0M users ★ 2.9
VPN for Chrome: NordVPN proxy protection Access to every site · 16 permissions, 1 site pattern 15.0M users ★ 4.2
Honey: Automated Coupons & Rewards Access to every site · 7 permissions, 2 site patterns 13.0M users ★ 4.6
Tampermonkey Access to every site · 17 permissions, 1 site pattern 12.0M users ★ 4.7

Each links to what that extension can access and how its permissions have changed.

How to check your own extensions

Type chrome://extensions in the address bar and find the extension in the list.
Open its details. The Permissions section lists what Chrome granted it, in Chrome's own words.
Open its details. The site access setting shows where it can run; set it to run only on click and it reaches a page only after you press its icon.
To uninstall it, choose Remove on the same page.

Figures come from our own daily pass over the public Chrome Web Store. We do not install or audit extensions and publish no contact details for their developers. Catalog pass of 2026-10-10.

Browse the catalog

Where the data comes from: how the catalog is built