Platform
TanLens in Firefox: captions without tab capture
Use TanLens in Firefox for microphone sessions, file transcription, transcripts and broadcast rooms. Tab audio capture requires Chrome or Edge.
TanLens works in Firefox as a web app, but Firefox does not run the TanLens extension. That means microphone sessions, file transcription, transcript editing, glossaries and broadcast rooms are available, while tab audio capture is not. If your meeting or video is in a browser tab, open that page in Chrome or Edge to caption it.
01What Firefox users can do
Sign in to the web app, choose microphone mode for a room or headset, or upload a recording for file transcription. Saved transcripts, glossaries and exports work the same as in any other browser because they run in the web app. Broadcast rooms also open normally, so Firefox is a fine viewer browser for an audience. If you only need captions from a microphone or a file, the missing extension does not affect you at all.
02If you need tab audio
There is no TanLens extension for Firefox today, and the web app cannot capture another tab’s audio by itself. The practical route is to open the same URL in Chrome or Edge with the extension installed, then start the session there. That also applies to streams and web players: the audio source and the capture tool have to be in the same browser. Safari has the same limitation, while Chrome and Edge are the two browsers where tab sessions are supported.
Frequently asked questions
Related pages
Put words on the screen tonight
Twenty free minutes a month, no card, no meeting bot. Start with your microphone, then add the extension for tab audio.