Board Thread:Questions and Answers/@comment-26961787-20180912161440/@comment-31265343-20180914154902

As the browser is responsible for rendering the game, it might be something else. I guess your Internet connection bandwidth was taken up by the other tab, which was causing some resources to not load. If you know what to look at, you can look at the network monitor under developer features.

Opening a new window means to open the browser as another process.

As for Windows not showing all memory, is it the 64-bit edition? The 32-bit edition is unable to utilize all 4GB of memory.