Multithread Download Manager Optimized by Comss
Download manager with multithreaded support.
Extension Metadata
About this extension
This is a new fork of Multithreaded Download Manager by jingyu9575: https://addons.mozilla.org/en-US/firefox/addon/multithreaded-download-manager/
This fork focuses on stability, download integrity, and compatibility with modern Firefox builds.
It improves handling of large files, adds safer fallback behavior for problematic servers, reduces memory pressure during chunk processing, and introduces adaptive threading to prevent stalled or corrupted downloads.
It also improves resilience against range/content-length mismatches, adds smarter host-based single-thread fallbacks (including SourceForge-like hosts), and includes practical compatibility hardening for Firefox Nightly-related API edge cases.
This fork focuses on stability, download integrity, and compatibility with modern Firefox builds.
It improves handling of large files, adds safer fallback behavior for problematic servers, reduces memory pressure during chunk processing, and introduces adaptive threading to prevent stalled or corrupted downloads.
It also improves resilience against range/content-length mismatches, adds smarter host-based single-thread fallbacks (including SourceForge-like hosts), and includes practical compatibility hardening for Firefox Nightly-related API edge cases.
Rated 3 by 1 reviewer
Permissions and data
Required permissions:
- Get data from the clipboard
- Input data to the clipboard
- Download files and read and modify the browser’s download history
- Open files downloaded to your computer
- Display notifications to you
- Access browser tabs
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Version
- 3.5.2
- Size
- 229.91 KB
- Last updated
- 12 days ago (Mar 9, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Version History
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