Source: https://subagentura.tech/screencast/ # Private screen recording. Record it. Keep it. Capture a tab, window, or entire screen without an account or an upload. Preview locally, download the WebM, and stay in control of every frame. [Add to Chrome](https://chromewebstore.google.com/detail/screensilo/higbocdfimfmcjckomeggbbigcglpdje) [Add to Firefox](https://addons.mozilla.org/en-US/firefox/addon/screensilo/) [View the source](https://github.com/lmn451/screencast) No sign-in No uploads No extension tracking Manifest V3 ## From screen picker to saved file. Native browser APIs, a focused interface, and no service standing between you and the recording. ### Local by default Recordings stay in your browser. ScreenSilo has no upload service, account, or analytics pipeline. ### Pick the right surface Capture a tab, window, or screen, with optional microphone and available system or tab audio. ### Stop without hunting End a recording from the toolbar popup or the small on-page overlay, then jump straight to preview. ### Keep the file Preview locally, download a WebM, or delete it. The recording remains under your control. ## Your recording never needs to leave the browser. ScreenSilo processes and stores recordings locally. There is no backend account, cloud upload, telemetry endpoint, or broad`` host permission. [Read the full privacy policy](https://subagentura.tech/screencast/privacy/) ### Local processing Native browser capture and MediaRecorder APIs capture and encode video on-device. ### Local storage Recording chunks and previews are persisted in browser-managed IndexedDB. ### Narrow permissions Manifest V3 permissions support capture, the stop overlay, local state, and recovery. ### Inspectable implementation Inspect the recording lifecycle, message validation, storage, and tests on GitHub. ## Capture, preview, done. Four short steps, then a portable file under your control. 01 ### Open Click ScreenSilo in Chrome, Edge, or Firefox. 02 ### Choose Select a tab, window, or screen and configure audio. 03 ### Record Capture your walkthrough and stop from the page or popup. 04 ### Save Preview the local recording, then download the WebM. ## Install ScreenSilo or inspect the source. Install v0.2.3 from the Chrome Web Store or Firefox Add-ons. For a source build, clone the repository and load the unpacked Chromium extension. GitHub release archives and store publication are separate distribution paths. [Chrome Web Store](https://chromewebstore.google.com/detail/screensilo/higbocdfimfmcjckomeggbbigcglpdje) [Firefox Add-ons](https://addons.mozilla.org/en-US/firefox/addon/screensilo/) [Browse the repository](https://github.com/lmn451/screencast) Manifest V3 MediaRecorder IndexedDB TypeScript esbuild ### Load it unpacked Build locally, then add the repository folder to Chromium. ``` git clone https://github.com/lmn451/screencast.git cd screencast && pnpm install && pnpm run build ``` - Open `chrome://extensions` or your browser equivalent. - Enable Developer mode. - Choose Load unpacked and select the repository folder. ## ScreenSilo recording questions. Practical answers before you install or use the code. ### What can ScreenSilo record? Select a tab, window, or screen in your browser's sharing prompt. Microphone audio and system or tab audio are optional; availability depends on the browser, operating system, and selected surface. In v0.2.3, microphone and system audio are mixed into one recorded track. ### Which browsers and versions are supported? The v0.2.3 Chromium package requires Chrome or Edge 116 or later. The Firefox Add-ons listing declares Firefox 109.0a1 or later. The repository also documents unpacked installation in Brave, Opera, and Vivaldi; it does not publish a separate operating-system compatibility matrix. ### Can I record my webcam or edit the video in ScreenSilo? Current documentation covers screen capture and optional audio, without webcam capture, in-app trimming, or format conversion. Preview the recording locally and download a WebM file, then use a separate editor if you need to edit or convert it. ### Are recordings uploaded or encrypted? The extension has no upload service and does not send recordings to its developer. Recordings remain in browser-managed IndexedDB until you delete them or browser data is cleared, including according to the browser's extension-removal behavior. ScreenSilo does not encrypt them at rest. Downloading does not delete the browser copy, and downloaded copies remain outside the extension. ### Does ScreenSilo track me? The extension has no analytics pipeline and does not send capture data to its developer. The product website is separate and loads site analytics; the privacy-policy page disables site analytics. Sharing a downloaded recording through another app is governed by that app's behavior. ## Sources and review. Reviewed by [lmn451](https://github.com/lmn451) on 21 October 2026. Version 0.2.3 was released on 11 September 2026. Store compatibility metadata and available capture/audio sources are browser-specific. This product page loads website analytics; the extension does not, and the privacy-policy page disables them. - [v0.2.3 release and Chromium minimum version](https://github.com/lmn451/screencast/releases/tag/v0.2.3) - [Chrome Web Store listing](https://chromewebstore.google.com/detail/screensilo/higbocdfimfmcjckomeggbbigcglpdje) - [Firefox Add-ons version history](https://addons.mozilla.org/en-US/firefox/addon/screensilo/versions/) - [Mozilla compatibility metadata](https://addons.mozilla.org/api/v5/addons/addon/screensilo/) - [Source at the reviewed revision](https://github.com/lmn451/screencast/tree/5f806c385b753cbc757da90a7a19377b3b380a95) ## Behind the build - [How ScreenSilo keeps screen recordings local](https://subagentura.tech/blog/keeping-recordings-local/)