It works well for what it is, but it significantly increases the delay before load times for websites. If I try to open even, like, three tabs at once with this extension enabled, each of those pages will take at least 3-4 seconds to start loading. It's really bizarre and frustrating. Disabling the extension fixed the issue for me.

It does not work on Firefox in win10.

Make browser freeze for seconds in every few minutes

I use this on Chrome and Firefox on Linux but did not work on this Win10 I just tried.