The Stream Detector

Name: The Stream Detector
Rating: 4.3269 (156 reviews)
Author: 54ac

By: 54ac

This addon provides an easy way to keep track of manifests and subtitles used by various streaming protocols. Also allows for detecting custom file types and downloading media files.

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Features & Capabilities

The Stream Detector is a powerful Firefox addon designed to simplify tracking and downloading media streams. It detects URLs to playlists and subtitles across popular streaming protocols like Apple HLS, Adobe HDS, MPEG-DASH, and Microsoft Smooth Streaming. Users can easily copy stream URLs or generate ready-to-use commands for tools such as yt-dlp, FFmpeg, and Streamlink, including necessary headers for seamless downloads.

Beyond common streaming types, the addon also monitors custom file extensions and Content-Type headers, making it versatile for media tracking and retrieval. Direct media file downloads are supported, with customizable options to tailor user experience. Note: Mainstream platforms like YouTube or Vimeo often use proprietary streaming methods which this addon does not support; dedicated tools are recommended for those.

User Growth & Download Statistics

Add-on Developer Tools

By:

54ac

Daily users:

14,744 -85

Rating:

4.33

(156)

Version:

2.11.7 Last updated: 2023-07-13

Version code:

5591786

Creation date:

2016-06-03

Risk:

Permissions:

Size:

48.99KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 608 ▼ 2

Other rankings

#46 in Download Management ▼ 2

#82 in Other extensions

#93 in Photos, Music & Videos ▼ 2

#2 in stream keyword 34

#3 in detect keyword 30

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For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

54ac

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/hls-stream-detector/

Website:

https://github.com/54ac/stream-detector

User Reviews

The Stream Detector is generally praised for being useful and reliable, with strong stream-handling capabilities (detecting streams, m3u8 links, and Jellyfin-related downloads) and even generating ffmpeg commands when ffmpeg is installed. It’s viewed as a cleaner alternative to adware-like downloaders. A recurring downside is that the toolbar icon can be hard to find or invisible on some setups, requiring workarounds. Overall, most users report positive experiences with some UI accessibility caveats.

Pros

Widely praised for usefulness and reliability; reviewers describe it as 'works great', 'amazing', and a time saver.
Handles media streams well, including detecting embedded streams, obtaining m3u8 links, and downloading transcoded media (e.g., with Jellyfin), with good support for external players.
Can generate ffmpeg commands to download videos when ffmpeg is installed, even when the addon does not download directly.
Seen as a cleaner, adware-free alternative to other download add-ons and not pushing companion apps.

Cons

Toolbar icon visibility/access issues: in some Firefox setups the icon is not visible or the button is hard to locate, requiring workarounds.

Recent reviews

by Ki*****, 2026-04-15

by Fi*****, 2026-03-18

Loved this addon it was such a timesaver! However, it stopped working for me on some sites. I tested it on both LibreWolf and Firefox on Linux & W11 but no luck. I can still get the playlist.m3u8 from the website with the developer tools but TSD shows me nothing.

by aU*****, 2026-02-17

View all user reviews ›

Is The Stream Detector Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

The Stream Detector requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

The Stream Detector has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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