Download Movie on X 作者： grad13

Download Movie on X adds a download item to X’s share menu so you can save videos, GIFs, and images from posts on x.com.

What it does
• On a post with video or GIF: open share (↑), then choose 「動画をダウンロード」.
• On a photo post: open share, then choose 「画像をダウンロード」.
• Saves through the browser download manager as {username}_{postId}.mp4 or .jpg (multi-media posts get _1, _2, …).
• Video: highest-bitrate progressive MP4 when available. Images: prefers orig quality.
• Uses your already signed-in X session (and a public syndication fallback when needed). No API keys.

What it does not do
• Does not use the official X developer API product or ask for developer tokens.
• Does not bulk-download timelines, auto-scroll, or archive accounts.
• Does not collect personal data; media is fetched only from X/twimg endpoints in your browser.

How to use
1. Install the add-on and open x.com while signed in.
2. Find a post that contains a video, GIF, or image.
3. Tap the share icon (↑) on that post.
4. Choose 動画をダウンロード or 画像をダウンロード.
5. The file lands in your browser Downloads folder.

Notes
• Works on x.com (and twitter.com when that host still loads the same UI).
• Private / deleted posts, pure HLS-only streams, and DRM are not supported.
• X may change layout or internal endpoints; if the menu item or download stops working, update the add-on when a fix is available.
• Toolbar button (optional) opens this usage guide; icons flip for light/dark browser themes.

About this add-on
This is a personal project, built first of all for my own daily use. If something is broken for you, or almost works but not quite, I'd like to improve it. Feedback is welcome (anonymous, no account needed):
https://docs.google.com/forms/d/e/1FAIpQLSe0VN9ENGcRTgKjPdldg6VmeNlDMNeZDHR_m9-9J3xP6Jgd6g/viewform?usp=pp_url&entry.286324476=Download+Movie+on+X