DDM — DedSec Download Manager by DedSec - Cyber Security Research Institute
Companion for DDM for Windows: hands downloads to DDM (fast, multi-connection, resumable) and adds a Download button above videos you play.
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About this extension
Description: DDM — DedSec Download Manager is a free download manager for Windows. This add-on connects Firefox to it.
What it does:
Catches downloads. When you download a file in Firefox, DDM's download window opens instead. DDM downloads with several connections at once and can resume after a disconnect, a sleep or a restart.
Adds a video button. A small Download button appears just above the top-right corner of a video once it starts playing. Click it to see the available qualities and save the one you want with DDM.
Adds right-click menus: "Download with DDM" on links, "Download this video with DDM" on videos and audio, and "Find videos on this page with DDM".
Keeps you signed in. For files that need your sign-in, the site's cookies for that one download are passed to DDM, so the download works the same as in the browser.
What it does:
Catches downloads. When you download a file in Firefox, DDM's download window opens instead. DDM downloads with several connections at once and can resume after a disconnect, a sleep or a restart.
Adds a video button. A small Download button appears just above the top-right corner of a video once it starts playing. Click it to see the available qualities and save the one you want with DDM.
Adds right-click menus: "Download with DDM" on links, "Download this video with DDM" on videos and audio, and "Find videos on this page with DDM".
Keeps you signed in. For files that need your sign-in, the site's cookies for that one download are passed to DDM, so the download works the same as in the browser.
Requires the free DDM desktop app for Windows (https://dedseec.com). Without it, Firefox keeps downloading normally. The add-on sends data only to the DDM app on your own computer, never to the internet.
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Permissions and data
Required permissions:
- Exchange messages with programs other than Firefox
- Download files and read and modify the browser’s download history
- Access browser tabs
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 4.0.5
- Size
- 45.3 KB
- Last updated
- 4 days ago (Nov 8, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
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