Tayseer Downloader by Tayseer Store

Tayseer Downloader is a download manager for Windows, and this add-on connects it to Firefox. It adds a small "Download" button over videos while they play: click it, see the available qualities with their file sizes, pick one, and the download starts immediately in the Tayseer Downloader desktop app. On a playlist you can download every video in one click. It also hands the files you download in Firefox to the app, which downloads them faster over several connections and lets you pause and resume them.

IMPORTANT: this add-on is a companion to the Tayseer Downloader desktop app for Windows. The app must be installed and running on the same computer; the add-on does not download anything by itself. Get the app (30-day free trial, then a subscription) from Tayseer Store:
https://tayseer.store/download

FEATURES
- A "Download" button appears at the top corner of a playing video. It stays subtle and becomes fully visible when you move the mouse over the video.
- A quality menu: every video quality the site offers (for example 1080p or 4K) with its file size, plus audio only (MP3 or M4A).
- One click on a quality starts the download in the app, which shows the progress and saves the file.
- "Whole playlist": on a playlist (for example on YouTube) the menu shows a "Whole playlist (N videos)" section that downloads the entire playlist in one click, numbered in order, into a folder named after the playlist.
- Faster browser downloads: when you download a file in Firefox (an archive, an installer, an ISO image, a document, or any file larger than 2 MB), the add-on offers it to the app. If the app takes it, it disappears from Firefox's download list and the app downloads it over multiple connections, with pause and resume. Web pages are never taken, and if the app is closed or its option to take over browser downloads is off, Firefox downloads the file normally, so nothing is lost.
- "Open in the app" for links that need more options.
- Works on most video websites, including YouTube, in full-screen players and in embedded players.
- Interface in 19 languages, including English, Arabic, French, Spanish, Portuguese, German, Italian, Turkish, Russian, Japanese and Korean (follows the browser language).
- Private by design: no account, no ads, no analytics. The add-on talks only to the app on your own computer (127.0.0.1); it sends nothing to any server.

ABOUT THE TAYSEER DOWNLOADER APP (Windows 10/11, 64-bit)
- Downloads videos and audio from YouTube (videos, Shorts, whole playlists and courses, saved numbered in order), TikTok, Facebook, Instagram, X and more than 1000 other sites, in every available quality up to 8K, or as MP3.
- Downloads any direct file link (ZIP, EXE, ISO, PDF and more) over multiple connections for more speed, with pause and resume, even after you close the app.
- Catches downloads started in the browser and takes them over.
- Starts with Windows and waits quietly in the system tray.
- Interface in 20 languages.
- 30-day free trial, then a subscription.

HOW TO USE
1. Install and open the Tayseer Downloader desktop app.
2. Install this add-on, then reload the tabs that were already open.
3. Play a video and click "Download" at its top corner.
4. Pick a quality (or the whole playlist): the app starts downloading at once.
5. Download any file in Firefox as usual: if the app is running (taking over browser downloads is on by default in its Settings), it takes the download over automatically.
If the app is closed, the add-on opens it for you (Firefox asks once for permission) and then shows the qualities.

Please download only content that you own or have permission to download.