Lichess processor usage

If on the front page I click on my "1 games in play", the firefox usage goes up to 170%, and Xorg to 50%. This could certainly be due to an old browser, but I figure I should report it. Clicking on the "Realtime" tab instead reduces this to 20% or less.

It also does this whenever I have "Current games" at the bottom, so when I am playing a game with another "current game" in progress, there is 200% processor usage.

Installed firefox 37.0.2 but couldn't reproduce, similar numbers that in chrome on my 6yo computer. Pentium D 3GHz 2 cores 64-bit. Xorg mostly 0 but goes up to 3-5% sometimes, firefox/chrome 5-30% spikes at 50%. Tried with 1 games in play, and then 2 to see it under the board.

Try it without any add-ons. It might be related to your video driver, i use nvidia 349.16.
/usr/lib/xorg-server/Xorg -version # 1.17.1
uname -r # 4.0.1-1-ARCH Hurr durr I'ma sheep