I often hear on this website that "Firefox isn't slow". Firefox does feel slower than Chromium based browsers. I don't know the technicalities but this is the

I often hear on this website that "Firefox isn't slow". Firefox does feel slower than Chromium based browsers. I don't know the technicalities but this is the reason why I moved to Chromium (Opera). However, I like the fact that Firefox does allow me to mute audio and stop video playback by default, which Chrome does not (Opera does though). Finally I'm not sure I like the all idpol noise coming from the Mozilla Foundation...