Porthole Privacy Policy

Porthole – Link Preview Without Opening Tabs · Last updated: November 9, 2026

In short: Porthole does not collect, transmit, sell or share any personal data. Everything it saves stays in your browser.

What is stored

Porthole saves three things, only in your own browser:

  • Saved links: the links and pages you choose to save to your list.
  • Preview history: the pages you previewed, so you can find them again. Previews opened in incognito windows are never recorded.
  • Settings: theme, language, drop mode and similar preferences.

Saved links and history are kept with chrome.storage.local on your device. Settings are kept with chrome.storage.sync, which Chrome stores in your browser and, if you use Chrome sync, in your own Google account. Svart Labs has no access to any of them.

Network requests

When you preview a link, your browser loads that page directly, just as if you had opened it in a tab. Before showing it, Porthole may request the start of the page (without cookies) to read its title and check whether it can be displayed in a frame. These requests go only to the site you chose to preview. Porthole never contacts a Svart Labs server or any other third party.

What is not done

  • No accounts, analytics, tracking or telemetry.
  • No reading of form data, passwords or the content of the pages you browse.
  • No remote code: everything the extension runs is included in the package.
  • No sale or transfer of data to third parties, and no use of data for advertising or creditworthiness.

Permissions

  • Access to all sites: lets Porthole detect Alt + click and drag & drop on any page you read, and show the preview window there.
  • declarativeNetRequest: many sites block being shown inside a frame. While a preview is open, Porthole removes these frame-blocking headers only for the preview frame. The rule is removed as soon as the preview closes; no other page or request is affected.
  • scripting and activeTab: show the preview on the current tab when you start it from the toolbar or the right-click menu.
  • contextMenus: adds “Preview with Porthole”, “Save link to Porthole” and “Save page to Porthole” to the right-click menu.
  • storage: saves your links, history and settings.
  • favicon: shows site icons next to your saved links and history.

Removing your data

You can delete saved links and history at any time from the Porthole panel. Uninstalling Porthole removes all of its data from your browser. Settings synced to your Google account can be cleared from Chrome’s sync settings.

Changes

If this policy changes, the new version will be published on this page with an updated date.

Contact

Questions? Email us at svartlabs.dev@gmail.com.