Chrome Permission Audit

Chrome 'declarativeContent' permission: conditional page actions explained.

Learn how Chrome's declarativeContent permission lets extensions enable their toolbar icon on matching pages without reading page content in the background.

Best fit

Best for developers and privacy reviewers learning how Chrome's privacy-preserving declarative APIs work.

Technical Manifest Audit

Permission specification & risk profile.

Review how Chrome enforces declarativeContent in Manifest V3 and how to tell legitimate user-triggered extensions apart from intrusive tools.

Risk level: LowerdeclarativeContent
Chrome install-time warning
None (displays no install-time warning in Chrome)
Manifest V3 declaration
{
  "manifest_version": 3,
  "permissions": ["declarativeContent", "activeTab"]
}
Legitimate uses vs. red flags
What to verify before granting this permission to an AI browser tool.

Legitimate AI reading uses

  • Highlighting the extension toolbar icon when the URL or CSS selector matches a supported page type, evaluated natively by Chrome without waking the extension

Red flags to watch for

  • Rarely abused—`declarativeContent` is one of Chrome's most privacy-friendly APIs because matching rules run inside the browser engine without exposing URLs to the extension
How Vezz me handles this: Vezz me works across all normal webpages where text can be selected and only processes text when you trigger your shortcut.
Step-by-step workflow

How to run this workflow in place.

1

Understand browser-evaluated rules

Instead of the extension reading every tab URL, the extension gives Chrome a static rule (`PageStateMatcher`), and Chrome lights up the icon locally.

2

Pair with user-triggered execution

Even when an icon lights up, no page content is read until the user clicks or presses the shortcut.

Key details

Why this approach works better than switching tabs.

Why declarative APIs are safer than imperative listeners
In Chrome's security model, `declarativeContent` and `declarativeNetRequest` let the browser evaluate conditions in C++ without handing raw browsing events to JavaScript.
  • Displays zero install-time warnings because no user data is exposed to the extension script
  • Encourages on-demand `activeTab` workflows
Frequently asked questions

Common questions about chrome permission audit.

Can declarativeContent read the text inside a webpage?

No. It can only check whether a URL pattern or CSS selector exists on the page to toggle the extension's toolbar icon state.

Related workflows & guides

Explore connected pages.

activeTab permission
How user-triggered tab access works in Chrome.
Open guide
All Extension Security & Permissions
Browse the complete directory of extension security & permissions on Vezz me.
View hub directory
Available for Chrome and Firefox

Ready to try this workflow on your own reading?

Install Vezz me free, highlight text on any webpage, and press your customizable shortcut (default: Ctrl+Shift+X or Cmd+Shift+X on Mac) to get an answer right beside the source.

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