Settings (zoom levels, keyboard shortcuts, theme, per-site profiles, exclude lists, saved video-link markers, the on/off switch and display mode of the Pinterest AI filter, your video preferences for sound, loop and videos-only browsing, the video bar switch, the interface language, the file types to skip, how the floating pager bar is shown, the explanations in the grid the list of allowed websites and the chosen operating mode (everywhere, only selected websites or on click), the chosen mode of the keyboard shortcuts (letter alone, with Alt or with Alt + Shift), the settings of the preview without a key (delay and exceptions) and whether you have already seen the tour; site profiles can apply to a whole website, one area or all subdomains) are stored locally in the browser only (chrome.storage.local) and are never transmitted.
Page content (images, videos, links) is read locally in the browser only, in order to provide zoom, preview and gallery features. Your browsing history is never analysed, stored or transmitted.
Video preview: The running picture of a video on the page you visit is shown locally in the browser, in the preview. Nothing is downloaded or recorded; if you save or copy a still image, a single image is created at your request.
Video bar: For videos without controls of their own, the extension shows a bar with playback, time, sound and speed, controlling the video of the page you visit locally in the browser. The same applies to the full-screen view with its own timeline. Nothing is recorded, downloaded or transmitted. The bar can be turned off in the settings.
Downloads are started only in response to an explicit user action and are saved to your local Downloads folder. While a download is in progress, the extension keeps its download ID, the associated tab ID and the source URL in chrome.storage.session, so that the finished download can be reported back to the right tab. This information is cleared automatically when the browser closes and is never transmitted.
Folder marker: in order to create the configured target folder, or open it in your file manager, the extension may place a small text file (leuchttisch_marker.txt or .leuchttisch_folder_loc.txt) in that folder. Only the corresponding entry in the browser's download history is removed afterwards — files on your hard drive and genuine user downloads are never deleted or modified.
Image response headers: for the image and media responses that the page you visit loads anyway, the extension notes the content-type and content-length in memory (at most 5000 entries) to display file type and file size correctly — without sending requests of its own. Nothing of this is stored on disk or transmitted; it is gone when the browser closes.
Rating prompt: so that it can ask once for a review after about 20 previews, the extension counts locally how often the preview has shown an image and remembers your answer (“Later”, “Don’t ask again”, rated). Only the number is counted, not what or where you looked at. This information stays in chrome.storage.local and never leaves the browser.
Error log: internal errors of the extension are stored in a local ring buffer (at most 50 entries) and are shown only to you, in the extension's options page.
Detail pages: To find a larger version of an image, the extension may load the detail page that the image links to on the same website. This works the way your browser itself does, that is with your existing session on that website; the extension neither reads nor stores any cookies. The page is kept in memory only briefly and then discarded.
Pinterest AI filter (off by default): Only if you switch it on, and only on Pinterest, the extension loads the pin pages of the pins on screen from Pinterest itself and looks in them for an AI label from Pinterest or an AI notice in the text. The evaluation happens locally in the browser; no images are analysed, and nothing is stored or transmitted to third parties. A match only means that Pinterest or the text contains a notice — without a notice an image can still come from an AI.
To load images (for example for the clipboard or format conversion) and to load follow-up pages, the extension retrieves content from the website you are currently visiting — without cookies or credentials, as far as technically possible.
To state an image's format, resolution and file size reliably, the extension retrieves the beginning of the image file (8 KB, up to 64 KB if needed) and reads those details from its header. Only for the one image whose info panel you open is up to 128 KB read, to name its colour profile. The whole image is never loaded for this, and these requests are also made without cookies or credentials.
Report a problem: The “Report a problem” link in the popup and settings only prepares an email to mys4store@gmail.com after you click it. The template contains the extension version, browser version, operating system and language setting. You can use it in your email program, optionally in Gmail in your browser (opens mail.google.com), or as text via the clipboard. The extension sends nothing itself. You see the message before sending and can change or delete any detail. No page addresses or browsing history are added. Google’s privacy terms apply to Gmail.
Rating: only when you click “Rate now” does the extension open the Leuchttisch Studio review page in the Chrome Web Store in a new tab. Nothing is transmitted; from the opened tab on, Google’s privacy policy applies.
Reverse image search: when you press the reverse-search key (R), the extension opens the image search services you selected in the settings in new browser tabs and passes the address of that one image. Nothing else is sent, and without that key press there is no contact with these services at all. From the opened tab on, the privacy policy of the respective provider applies.
The AutoPager feature downloads a public rule file (JSON with URL patterns and selectors) from GitHub (raw.githubusercontent.com) and keeps it locally. The address points to a fixed, immutable revision of that file; it is downloaded again when a future version of the extension points to a newer revision, and at the latest after 30 days. No user data whatsoever is transmitted; it is a simple file download.
Error log: internal errors of the extension are stored in a local ring buffer (at most 50 entries) and are shown only to you, in the extension's options page.
The extension contains no analytics, advertising or tracking components. On its own it transmits no data to the developer or to third parties, and nothing is sold or passed on. The only exceptions are the reverse image search and the “Report a problem” email described above, both of which happen only when you ask for them; the rating link only opens the page in the Chrome Web Store.
If you have questions: mys4store@gmail.com
Leuchttisch Studio is © 2026 mys4store. The extension may be used free of charge; copying, redistributing or reusing its code is not permitted without permission. The full licence and notes on third-party material are included in the extension (Settings, footer, "Lizenz"). Leuchttisch Studio is not affiliated with Pinterest or any other company mentioned.