Levernook — Privacy Policy

Product: Levernook: Enable Right Click & Copy, a browser extension for Firefox and Opera.
Publisher: Zydeno. Contact: [email protected]
Effective date: 19 October 2026.

In short

Levernook works entirely inside your browser. The extension stores data only in your browser (storage.local); nothing is sent to Zydeno or anyone else; no analytics, no telemetry, no advertising, no accounts and no remote code. It does not collect, store or send what you select, copy or type, and it never reads the clipboard (when you copy, the page script only checks inside the page whether something is selected).

What is stored, and where

In the browser's extension storage (storage.local) Levernook keeps your settings (the last lever you used, whether opening the panel unlocks the tab, whether the button menu shows "Strong mode for this tab", clean copying, hiding "copying is not allowed" pop-ups, theme and interface language) and your list of sites that open unlocked on every visit. Each list entry holds a host name, a domain or a section that you typed or chose in the panel (for example *.example.com or example.com/blog/*), its mode (Gentle or Strong) and the date it was added. Levernook does not store other page addresses, page titles, browsing history, page text, selections, clipboard contents or anything you type.

While the browser is open, session storage (storage.session) remembers which open tabs are unlocked and in which mode, and in which tab you turned Levernook off for a site. It is cleared when the browser closes.

Uninstalling the extension removes this data. You can remove single sites on the settings page at any time.

What happens on a page

When you click the Levernook button, press its shortcut or choose its menu item, or when you open a site you put on your list, Levernook adds a small script and style sheet to that page. They make the page stop cancelling the browser's own right-click menu, text selection and copying, ignore text a page tries to add to what you copy, and, in Strong mode, let the mouse through invisible layers. The script works only inside that page, keeps no data and sends nothing anywhere. When you copy, the browser itself writes your selection to the clipboard; Levernook never reads the clipboard.

Permissions

activeTab — after you click the button, press the shortcut or pick the button-menu item, lets Levernook work on the current tab only, until you leave that page.
scripting — adds the page script and style sheet described above to that tab, and to the sites on your list.
storage — saves your settings and your list in your browser.
contextMenus — adds "Strong mode for this tab" to the menu of the Levernook button (you can hide it in Settings).
Access to sites (optional) — asked only for a site you add to your list ("Unlock on every visit" or "Add site"), and only for that site or domain. Your browser asks you once; if you say no, the site stays on the list and Levernook waits for your click there. When you remove a site from the list, the access given for it is handed back to the browser. Levernook is installed without access to any website.

Export and import

Export saves your list and settings to a JSON file on your computer. You decide where the file goes and who sees it; it contains the site patterns on your list. Import reads a file you choose, checks every entry before anything is replaced, and can be undone right after.

Network

Levernook makes no network requests of its own. Fonts, icons and translations are inside the extension. The optional "Rate this extension" link opens the store page only if you click it; that site's own privacy policy then applies.

Children

Levernook collects no personal data from anyone, including children.

Changes and contact

If this policy changes, the new version will be published at this address with a new effective date. Questions: [email protected].