I have confirmed that often, voice-to-text breaks when one has multiple Chrome windows open. I am using the Voice Computer-supplied Chrome extension. The fix seems to be closing all windows except one, then closing that window, and reopening Chrome. With the single window open, voice-to-text works again.
For the record, this is the Dragon Web Extension that’s failing.
Need to test to see if the Dragon extension works better in Edge.
I’d be happy to return to Firefox, but I understand one needs to use the development edition. If you would post the full instructions for installing and configuring it, along with your extension, I’d be happy to try it instead. Chrome is somewhat usable with one window open, but with more than one, Dragon doesn’t work properly.