1941809 - https://online-video-cutter.com/ - Green screen tool not supported except in Chrome & Edge

Status: NEW

(Web Compatibility :: Site Reports, defect, P2)

Description

[Randell Jesup [:jesup] (needinfo me)]

Environment:
Operating system: Windows 10
Originally reported Firefox version: Firefox 135.0a1
Platforms reproduced on: windows

Steps to reproduce:
on firefox you're unable to use the Green Screen tool; the site puts up a tooltip when you hover the tool telling you it's only supported on Chrome or Edge

Actual Behavior:
Browser unsupported

STR: load the page. Add any video. mouse over the green screen

Comment 1

[Holger Benl [:hbenl]]

I mentioned in the "needs diagnosis" meeting that I found the event handler that is called when the mouse enters the "Green Screen" button (by searching for "remove_color_unsupported_tooltip" in the sources).
However, that's probably a dead end: on Chrome this event handler is simply not attached to the "Green Screen" button, so the logic for detecting Firefox is most likely not called by the event handler but by the function that attaches the event handler to the button.

Comment 2

[Thomas Wisniewski [:twisniewski]]

Removing needs-sitepatch, since it's unclear what the problem is, or even what they are doing to block Firefox, as a simple UA spoof isn't enough to bypass the block. I also see that they might recommend not using Firefox for recordings in their code:

        'rec_dialog_record_hint': 'Due to Firefox limitations it\'s recommended to use Google Chrome for recording purposes',

Comment 3

[Holger Benl [:hbenl]]

The Green Screen tool is disabled because Firefox doesn't implement the EyeDropper API (which it uses to let the user pick the color to remove):

'showReplaceColorController'() {
  return 'EyeDropper' in window;
},

Implementation of that API is tracked in Bug 1728527.