How Kernline handles permissions and privacy

Kernline is a browser extension. This page describes the permissions it asks for and what it does with them.

When you install it

Kernline asks for activeTab, scripting, storage, and contextMenus. It does not ask to read every website. activeTab lets it read the tab you are on only after you click the toolbar icon, press Alt + Shift + K, or choose “Inspect with Kernline”.

Another domain

If a page loads a stylesheet, font, or frame from another domain, the browser will not let an extension read that file until you allow it. Kernline asks for that domain only. You can refuse. Computed styles on the page still show without that permission. Remove a domain in Kernline settings, or in the browser’s extension permissions.

What stays on your machine

Settings, overlays you save, and the cached licence state stay in extension storage. Uninstalling the extension removes them.

What is sent over the network

A licence check goes to Polar. It does not include the page or the URL. If you allow another domain, Kernline fetches those files from that domain so it can show original rules or save an asset. Devson Software does not receive the page.

Payments

If you buy Pro, Polar processes the payment and stores the email you give them. The privacy policy is the full account.