1913911 - frame-extractor.com - Firefox is not a supported browser

Status: VERIFIED FIXED

(Web Compatibility :: Site Reports, defect, P3)

Description

[Calin Tanase (PTO until 15th of May)]

Environment:
Operating system: Windows 10
Firefox version: Firefox 129.0/131

Steps to reproduce:

1. Go to https://frame-extractor.com
2. Observe the page.

Expected Behavior:
The browser is supported.

Actual Behavior:
Unable to use the frame extraction feature, unsupported message displayed instead.

Notes:

• Reproduces regardless of the status of ETP
• Reproduces in Firefox Nightly, and Firefox Release
• Does not reproduce in Chrome

Created from https://github.com/webcompat/web-bugs/issues/140548

Comment 1

[Calin Tanase (PTO until 15th of May)]

Attachment: image.png

Comment 2

[Dennis Schubert [:denschub]]

Seems like they do feature detection, UA spoofing doesn't seem to work. We should try to figure out which API they spoof on.

Comment 3

[Ksenia Berezina [:ksenia]]

Attachment: 1913911.html

This depends on MediaStreamTrackProcessor method

export async function getTrackReader(video) {
  await video.play()
  const userAgent = navigator.userAgent
  let stream = null

  try {
    if (userAgent.indexOf('Firefox') > -1) {
      stream = video.mozCaptureStream()
    } else {
      stream = video.captureStream()
    }
  } catch (e) {
    return
  }

  const [track] = stream.getVideoTracks()
  await video.pause()

  if (!track) {
    return
  }

  try {
    const processor = new MediaStreamTrackProcessor(track)
    return processor.readable.getReader()
  } catch (e) {
    return
  }
}

 async function checkCompability() {
    const sampleVideo = getVideo('sample.mp4')
    const sampleReader = await getTrackReader(sampleVideo)
    if (!sampleReader) {
      setShowUpload(false)
    }
  }

I've also attached a testcase.

Comment 4

[Krzysztof Szularz]

Hi, I'm the creator.

I've since added some polyfill and now it's working in FF.

Comment 5

[Calin Tanase (PTO until 15th of May)]

I can confirm, it works on both FF Release and Nightly and I can upload and extract frames without any issues.

Comment 6

[railioaie]

Verified, works as expected.

Tested with:

Browser / Version: Firefox 137.0-candidate build 1
Operating System: Windows 10