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Permission · webRequestBlocking

What the webRequestBlocking permission means for a Chrome extension

Live Chrome Web Store extensions that declare webRequestBlocking: 163, which is under 1% of the 270 859 whose permissions we have read. Counted after our catalog pass of 2026-10-10.

What it lets an extension do

Block or alter network requests before they are sent webRequestBlocking

Reaches your browsing data or every site

Permissions in this group reach your browsing data or every site. Plenty of honest extensions need one; check that what the extension is for explains it.

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
CategoryShare of extensionsExtensions
Make Chrome Yours · Privacyunder 1%14 of 5 449
Lifestyle · Well Beingunder 1%4 of 2 878
Productivity · Developerunder 1%27 of 28 348
Productivity · Communicationunder 1%6 of 7 120
Lifestyle · Entertainmentunder 1%5 of 6 363
Productivity · Workflowunder 1%30 of 45 721
Productivity · Toolsunder 1%59 of 106 510
Make Chrome Yours · Accessibilityunder 1%4 of 8 075
Productivity · Educationunder 1%5 of 11 516
Make Chrome Yours · Functionalityunder 1%4 of 11 127
Lifestyle · Shoppingunder 1%3 of 8 708
Lifestyle · Socialunder 1%1 of 7 160
Lifestyle · Fununder 1%1 of 8 489
Lifestyle · Art0%0 of 3 519
Lifestyle · Games0%0 of 6 897
Lifestyle · Household0%0 of 493
Lifestyle · News0%0 of 1 631
Lifestyle · Travel0%0 of 855

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

  1. Tampermonkey Access to every site · 17 permissions, 1 site pattern 12.0M users ★ 4.7
  2. IE Tab Access to every site · 10 permissions, 1 site pattern 4.0M users ★ 4.3
  3. Stylus Access to every site · 14 permissions, 1 site pattern 1.0M users ★ 4.5
  4. LanSchool Web Helper Access to every site · 7 permissions, 1 site pattern 1.0M users ★ 1.2
  5. iboss Cloud Connector Access to every site · 24 permissions, 1 site pattern 1.0M users ★ 1.2
  6. xFanatical Safe Doc Access to every site · 14 permissions, 7 site patterns 1.0M users ★ 1.4
  7. Tampermonkey BETA Access to every site · 18 permissions, 1 site pattern 700k users ★ 4.8
  8. Guardio Protection for Chrome Access to every site · 12 permissions, 1 site pattern 700k users ★ 4.5
  9. Senso Extension Access to every site · 18 permissions, 1 site pattern 500k users ★ 1.0
  10. Black Menu for Google™ Access to specific sites only · 8 permissions, 4 site patterns 200k users ★ 4.6

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

How to check your own extensions

  1. Type chrome://extensions in the address bar and find the extension in the list.
  2. Open its details. The Permissions section lists what Chrome granted it, in Chrome's own words.
  3. 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.
  4. To uninstall it, choose Remove on the same page.

Other permissions

Figures come from the public Chrome Web Store, which our own crawler reads up to 2 times a day. We do not install or audit extensions and publish no contact details for their developers. Catalog pass of .

Browse the catalog

Where the data comes from: how the catalog is built