Slowdown after tab reload

Questions
1

I am suspecting this is a browser bug, but just in case someone has encountered it before and knows about a workaround, I thought I’d ask here.

I have a three.js app which is fine on first start, but as soon as I reload the tab, performance goes down the drain. 100% reproducible. It seems like something is not cleaned up, and while one would expect the browser to take care of that on tab reload, it obviously doesn’t.

Is there a recommended way to tear down the webgl context in onbeforeunload that may avoid this problem?

(reproducible on AMD and nVidia discrete cards with Firefox, though not with integrated graphics).

2

Does it help if you execute the following code in the onbeforeunload callback:

renderer.forceContextLoss();
3

That does the trick, thanks!