Hi! I have been experiencing the same error that while qBittorrent is running in the background, especially when multiple torrents are being downloaded and/or uploaded and too much memory is used, Firefox crashes many many times. The crash is strange, there is no popup window stating that FF crashed, just it gets closed. So I cannot present an error log. The first sign of this upcoming crash is that the FF window gets bigger, the bottom Windows taskbar disappers and FF freezes, then it becomes normal again and then it closes without warning. This same error could be experienced since at least 5 or 6 previous versions of FF. Although with every update it became scarcer, but still it can be experienced. Thanks for your help in advance.