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Google’s documented browser-casting method uses Chrome, not Firefox. To send a Firefox page to Chromecast, open the same page in an updated Chrome browser and use Chrome’s Cast menu. If the video or audio site has its own Cast button, use that instead when available: it sends supported media directly to the receiver rather than mirroring a browser tab.
Can you cast Firefox to Chromecast?
Google’s current browser-casting instructions explain how to cast from Chrome and do not provide a Firefox workflow. That means the documented option is to open the content in Chrome; the available sources do not establish that Firefox casting is categorically impossible or confirm a current official Firefox add-on.
A website’s own Cast control is a separate option. When a site supports it, the service can send compatible media directly to the receiver, so you do not need to project the Firefox tab. See Google’s Chromecast streaming guidance for the distinction between direct playback and tab projection.
How to cast the page using Chrome
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Open the same page in an updated version of Chrome. Google requires an updated Chrome browser for its documented casting procedure.
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Check that the computer and Chromecast or other Google Cast receiver have a strong connection to the same Wi-Fi network.
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In Chrome, select More → Cast, save, and share → Cast…, then choose your receiver. To show the entire computer screen, select Sources → Cast screen. Menu wording can vary between Chrome versions.
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To end a cast, open Chrome’s Cast control and select Stop casting.
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Google lists Chromecast, Chromecast with Google TV, Chromecast Ultra, Google TV Streamer (4K), and TVs with Google Cast as compatible receiver types for Chrome casting. Its requirements guidance covers Chrome OS, Windows, Mac OS X, and Linux; performance and tab-video quality depend on the computer and Wi-Fi connection. See Google’s setup and casting instructions and Google’s system requirements.
Use a site’s Cast button when available
For a supported video or audio service, look in the site’s player for its Cast button. This is direct playback: the receiver streams supported media from the service, rather than displaying a live projection of the browser tab. It can therefore work without casting the Firefox window itself.
Google says direct playback generally offers higher quality, uses less of the computer’s power, and may continue if the computer is shut down or its lid is closed. Availability and results depend on the site, content, receiver, and other equipment.
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Tab projection and direct playback compared
|
Feature |
Tab projection |
Direct playback from a Cast-enabled site |
|---|---|---|
|
What is sent |
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|
The site sends supported media directly to the receiver. |
|
Published audio and video capabilities |
Google lists up to 720p and stereo sound. |
Google lists support for 1080p and 5.1 audio. |
|
Effect on computer |
Uses more of the computer’s power. |
Google says it puts no load on the computer. |
|
Can playback continue if the computer is closed? |
No. The computer must remain on during tab projection. Rank #4
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Yes. Playback can continue if the computer is shut down or its lid is closed. |
|
When to choose it |
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|
When the site provides a Cast button. |
These are capabilities in Google’s published comparison, not a guarantee that every service, receiver, TV, or media item will support those formats. Google also notes that some browser plugins, including Silverlight, QuickTime, and VLC, do not work when casting Chrome content. See Google’s Chromecast streaming help.
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If Chrome cannot find the receiver
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Confirm the computer and receiver are connected to the same Wi-Fi network and that the receiver has a strong connection.
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Check that the receiver is powered on and available, then restart Chrome and the receiver.
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On computers running macOS 15 or later, check Chrome’s local network permissions, which Google flags as relevant to device discovery.
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If device discovery still fails after these checks, consult Google’s current casting instructions for the receiver and Chrome version you use.
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