Privacy Policy — Netflix Dual Subtitles

Last updated: 13 July 2026

Netflix Dual Subtitles (“the extension”) runs on your device. It has no analytics or tracking, no advertising, and no remote code, and it does not collect personal information. The only network requests it makes to the developer’s site are: (1) a small feature-configuration check when you open the popup (contains no personal data — see “Feature configuration”), and (2) a feedback submission, only if you choose to send one — either from the popup’s feedback form or from the short page that opens if you uninstall (see “Feedback” and “Uninstall feedback”).

Where it runs

Only on Netflix (https://www.netflix.com/watch/*, /title/*, /browse*, and /search*) — the watch player, the title/preview pages, and the search page, so dual subtitles work in the previews as well as full playback. It reads the subtitle information Netflix already loads for the video being shown to display a second subtitle language and offer related tools (search, copy, export). It runs on no other website.

Data stored on your device

Saved locally in your browser’s extension storage; it never leaves your device (unless you submit feedback):

• chosen primary/secondary languages and the feature toggles and timings (navigation keys, loop, auto-pause and its lead/auto-resume, loop wait-between-repeats, the "listen first" hide/reveal settings, click-to-copy, your saved "My setup" mode, and so on)
• subtitle text colors, the primary and secondary font sizes, on-screen height, the chosen subtitle font, and the outline/text-background/window legibility settings (their colors and opacities)
• the on-screen control panel’s position, and your transcript display preferences (paired/timeline view, the “follow” setting, and the dock’s side and width)
• the loop you last set, if “remember loop after refresh” is on — kept as start/end timestamps plus the episode’s Netflix video ID, so the loop can resume on the same episode after a refresh (stored only on your device; never sent anywhere)
• while a practice run is on: the Netflix ID (or title) of the show you started it on, so the run can carry across that show’s episodes and end itself when you open a different title (stored only on your device; never sent anywhere; cleared when the run stops)
• the status of the most recent subtitle load (shown in the popup)
• your chosen interface language for the extension (defaults to your browser’s language) and the global on/off setting
• a small private usage counter — how many separate days you’ve used the extension (and whether you’ve already seen the one-time feedback note) — used only to decide when to show a single, dismissible “send feedback?” prompt in the popup. It is just a number on your device and is never sent anywhere.
• which extension version you last viewed — so the popup can show a “What’s new” note after an update and briefly badge the icon. It is just a version number on your device and is never sent.
• your last “search & jump” query and the language you searched, so the panel restores them when you reopen it (kept on your device; never sent).
• your saved searches (the watchlist): each saved pattern’s name, the pattern itself, its highlight colour, and its on/off state — so your watchlist persists and can highlight matches as you watch (kept on your device; never sent)
• your practice presets — the named practice setups you save in the preset library, and which one you last used (kept on your device; never sent)
• the mini player’s preferences: its window sizes (for the subtitles-only and video views), which view you last used, and whether “open by itself when you switch tabs” is on (kept on your device; never sent). The auto-open consent itself is Chrome’s own prompt, handled and remembered by the browser, not the extension.
• if you activate an optional supporter key (a thank-you for donating), the key — and the details encoded in it (the display name shown on your badge, and an email only if one was included in the key you were given) — is saved on your device. It is verified entirely on your device and is never sent anywhere. A short list of any keys that have been deactivated is also kept (it arrives with the feature-configuration check below) and compared against your key locally.

Uninstalling the extension removes all of it.

Subtitle files

To display and export subtitles, the extension downloads subtitle files from Netflix’s own content servers (the same files Netflix loads for playback), within the Netflix page. These are not sent anywhere else.

Clipboard

The “click/drag a subtitle to copy it” feature is off by default. When enabled, selected subtitle text is written to your clipboard locally, only when you initiate it.

Feedback form (optional, user-initiated)

The popup includes an optional feedback/report form. If — and only if — you fill it in and press send, the following is transmitted, via the third-party form service Web3Forms, to the developer:

• the message you type
• an email address, only if you choose to enter one (so the developer can reply)
• basic diagnostics: the extension version, your browser’s user-agent string, and whether the extension successfully read Netflix’s subtitle list and how many tracks it saw

The diagnostics do not include your identity, your Netflix account, or which title you are watching. The form is never sent automatically. Web3Forms processes the submission under its own privacy policy.

Uninstall feedback (optional, user-initiated)

When you uninstall the extension, your browser opens a short feedback page on the developer’s website (netflix-dual-subs.pages.dev/uninstall.html). The page receives only your chosen interface language (so it can show in your language) — no personal data. It is entirely optional: nothing is sent unless you fill it in and press send. If you do, the same third-party service (Web3Forms) delivers what you typed — your message, any feature tags you tap, an optional reason, and an optional reply email — to the developer. No diagnostics, account, or viewing data are included.

Feature configuration

When you open the extension’s popup, it fetches a small static configuration file from the developer’s website (netflix-dual-subs.pages.dev) that toggles optional features (such as whether the feedback form is shown), carries the list of any deactivated supporter keys, and may include a short message from the developer (shown in the popup; you can dismiss it). This request sends no personal data (it is a plain download — your supporter key and its id are never sent); like any web request it includes your IP address, which the static host may log. The extension works normally if this check fails.

Permissions

• storage — to save your preferences on your device.
• access to netflix.com — so the extension can run on Netflix's watch, title/preview, browse and search pages and read/display subtitles. It runs on no other website.

Remote code

None; all code ships inside the package.

Change history

Material changes to this policy are listed here, newest first, with the extension version each change applies from (and onward). (This tracks changes to the policy — for the full list of app features and fixes, see the changelog.)

• 13 July 2026:
  • (v1.90.18+) While a practice run is on, the show it was started on (its Netflix ID, or its title) is stored on your device so the run can end itself when you open a different title. Cleared when the run stops. Never sent.
• 11 July 2026:
  • (v1.71.0+) Saved searches (the watchlist) are stored on your device — each saved pattern’s name, the pattern, its highlight colour, and its on/off state. Never sent.
  • (v1.73.0+) Practice presets — the named practice setups you save, and which one you last used — are stored on your device. Never sent.
  • (v1.81.0+) The mini player’s preferences (window sizes, the view you last used, and whether auto-open on tab switch is on) are stored on your device. Never sent. Auto-open uses Chrome’s own one-time consent prompt, handled and remembered by the browser itself.
• 14 June 2026:
  • (v1.66.0+) The extension now also runs on Netflix’s search page (/search), so dual subtitles work in the title preview you open from a search result. It reads only the same subtitle information Netflix already loads for that preview; nothing new is collected or sent.
  • (v1.61.0+) Optional supporter keys: if you activate one, the key (and the display name on it) is saved on your device and verified there — never sent. The popup’s feature-configuration check also began carrying a list of any deactivated keys, compared against yours on your device.
  • (v1.66.2+) The popup can show a short message from the developer (carried in the same configuration file the popup already fetches on open); you can dismiss it, and only which message you dismissed is remembered on your device. Nothing new is sent.
• 7 June 2026:
  • (v1.52.0+) Your chosen interface language and the global on/off setting are saved on your device; never sent.
  • (v1.54.0+) A private on-device usage counter (how many separate days you’ve used the extension) was added, only to time a one-time, dismissible feedback note in the popup. It is never transmitted.
  • (v1.53.0+) Uninstalling now opens an optional feedback page; it receives only your interface language, and sends nothing unless you submit it (then via Web3Forms, like the in-app feedback form). See “Uninstall feedback”.
  • (v1.57.0+) The extension remembers which version you last viewed (on your device) so it can show a “What’s new” note after an update and briefly badge the icon. Never sent.
• 5 June 2026:
  • (v1.37.0+) More on-device display preferences are saved: the chosen subtitle font (and a custom font name, if you enter one) and the legibility settings — outline strength, plus the text-background and window colors and opacities. The bundled dyslexia-friendly font (OpenDyslexic) is packaged with the extension and loaded locally — no font is fetched from the network. All stored locally; never sent.
• 4 June 2026:
  • (v1.28.0+) A few more on-device display preferences are saved: the separate primary/secondary subtitle sizes, and the transcript viewer’s settings (view, “follow”, and the dock’s side and width). All stored locally; never sent.
• 3 June 2026:
  • (v1.24.4+) The extension now also runs on Netflix’s title/preview and browse pages (previously the watch player only).
  • (v1.23.0+) If “remember loop after refresh” is on, a saved loop region — including the episode’s Netflix video ID — is stored locally on your device (and never sent).
• 2 June 2026: Initial policy.