Cast Firefox

Cast

Cast a media URL or mirror the browser window/screen to a Chromecast, with a native openscreen backend and no third-party tools.

Features & Capabilities

Casts media URLs, YouTube videos, and live window/screen mirrors (H.264, low latency) from LibreWolf/Firefox to a Chromecast on your LAN.

IMPORTANT: this extension requires the open-source castbridge native daemon (BSD-3-Clause) installed on the same machine; without it the extension shows an actionable 'native host missing' error and does nothing else. Source code and install instructions: https://github.com/gianlucamazza/cast

The content script runs on all http(s) pages because detecting castable media on arbitrary sites is the core feature; it is read-only detection and sends nothing off the device. All communication stays on the local machine (native messaging) and your LAN (Cast protocol). No analytics, no remote servers.

User Growth & Download Statistics

Manifest V3 Add-on
By:
Gianluca Mazza
Daily users:
347 37
Rating:
1.00
(1)
Version:
0.3.1 Last updated: 2026-06-13
Version code:
6300460
Creation date:
2026-06-10
Risk:
Very high risk impact High risk likelihood
Permissions:
Content scripts matches:
  • *
  • www.youtube.com
  • www.youtube-nocookie.com
Size:
40.48KB
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-07-29
Compare stats and ranking:

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:
Gianluca Mazza
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/castbridge-cast/
Website:
https://github.com/gianlucamazza/cast/issues

User Reviews

Я не сомневаюсь, что была проделана огромная работа и рад, что есть умельцы, которые что-то могут создать своими руками, но, к сожалению, нужно было потрудиться и хотя бы написать вскользь информацию о том, что дополнение будет работать, только если запустить еще дополнительные программы на Linux, и все работает исключительно в среде Linux.
by Fi*****, 2026-06-28
View all user reviews ›

Is Cast 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.

Cast requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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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.

Cast is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
  • Medium **** ********* *** *** **** *******
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