CSS Helper is a browser extension that shows the winning author CSS rules for any right-clicked element, rendered exactly as written in the source file.

What data CSS Helper uses
CSS rules from stylesheets loaded on the active page, only when the user explicitly triggers a context menu action.
The inspected element's tag name, attributes, and matched selectors — used solely to display results in the panel.
No data is retained after the panel is closed.
How CSS Helper uses data
To walk the page's stylesheets and identify which CSS declarations apply to the selected element.
To render a floating panel showing the winning rules with syntax highlighting and source filenames.
All processing happens locally in the browser tab. Nothing leaves the page.
Data sharing and transmission
CSS Helper does not collect, send, or store any user data.
CSS Helper makes zero network requests.
CSS Helper does not sell, transfer, or share user data with third parties.
CSS Helper does not use remote code, analytics, or tracking of any kind.
Storage
CSS Helper does not use chrome.storage, localStorage, IndexedDB, cookies, or any other storage mechanism.
Inspected CSS data exists only in memory for the duration of the panel display.
Permissions
contextMenus — to register the right-click "CSS Helper" menu item.
Content script on all URLs — to inspect CSS on any page the user visits. The script is passive and only activates on explicit user gesture (context menu click). No data is read, collected, or transmitted until the user triggers an inspection.