Core Functionality & Intent
GhostCheck is a productivity tool for survey programmers to validate clipboard text against webpage content. It is triggered exclusively by a double-click gesture on the page.

Permissions Rationale
clipboardRead: Essential for the core functionality; the extension reads the clipboard content to compare it against the visible text on the active tab.
activeTab & <all_urls>: Required to traverse the DOM, identify text nodes, and inject highlighting/UI elements (toasts and popup) on the specific pages the user is validating.
Security & Privacy
User Gesture: Clipboard access and validation are only triggered by an explicit dblclick event (see content.js:432).
Data Privacy: No data is collected, stored, or transmitted to any external server. All validation logic and processing are performed locally within the user's browser.
Performance: The script uses efficient DOM traversal (skipping script, style, and svg tags) and batch-updates styles to ensure no performance degradation during validation.