> This suggests two tests: A "foreground" visibility test ahead of prompting, and a "foreground" + focused test before resolving, to preserve the no-prompt case. I think this makes sense for `getUserMedia`. On desktop, it seems comforting to know that other browser windows that weren't using camera or microphone when I've left them open cannot decide to turn on camera or microphone on a whim while I'm not interacting with them. But what would this mean for `enumerateDevices`? Right now, Firefox's [check in enumerateDevices](https://searchfox.org/mozilla-central/rev/2d1097c27f31cb15f7588b043d691cda9710d14b/dom/media/MediaDevices.cpp#159,163,177-178) is: ```c++ if (!bc->IsActive() || // background tab or browser window fully obscured !bc->GetIsActiveBrowserWindow()) { // browser window without focus ``` IOW, the same page visibility AND focus of the user agent window (not the document) check. While an eventual focus requirement seems defensible for `getUserMedia`, perhaps the visibility requirement alone is sufficient for enumerateDevices? There it's anti-fingerprint, not anti-spying. @karlt @youennf Thoughts? -- GitHub Notification of comment by jan-ivar Please view or discuss this issue at https://github.com/w3c/mediacapture-main/issues/752#issuecomment-1293797299 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Thursday, 27 October 2022 16:42:08 UTC
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