The browser compatibility table for OfflineAudioContext.suspend has an empty cell for Firefox, which is quite confusing.
It works fine in Chrome. I still think that OfflineAudioContext.suspend is currently implemented in Firefox (v51.0.1), because I'm able to call the method. My problem is that whenever I call this method, I get:
DOMException [NotSupportedError: "Operation is not supported"
code: 9
nsresult: 0x80530009
location: http://localhost:4200/main.bundle.js:13603]
This is the order of the two main calls
offlineContext.suspend(0).then(() => ..., e => console.log(e))
offlineContext.startRendering()
console.log(e) prints the error message above, so it does not go into the success callback of the then.
I have tried modifying the "suspendTime" param of the suspend method, placing the call after the startRendering method, with no success.
Is it actually supposed to work in Firefox? I think it would be weird that they allow us to call the method, but make it fail all the time.
Most likely Firefox hasn't gotten around to implementing this feature for an offline context. (I think suspend is supported of an online audio context, though).