Just lately after decade plus of using Firefox I am getting computer hung up, nothing running but Firefox with 7 tabs open. That is how I been running FF for years, same 7 tabs open and no problems until a coupler months ago. I am on Windows 10 64 bit current with May updates, 12GB main memory, Intel Core i5 @ 3.20GHz, 500 GB WD HDD. The task manager right now is showing 49 FF processes running. All is well right now, but maybe by end of day or tomorrow it will hang up. Right now Virtual memory is set at 14838. I have it set at automatic manage paging file. My hard drive has 281 GB free space. Below is a warning error I see when FF hangs and sends in a report. Windows successfully diagnosed a low virtual memory condition. The following programs consumed the most virtual memory: firefox.exe (9264) consumed 41230716928 bytes, firefox.exe (1824) consumed 1195388928 bytes, and vmmem (1768) consumed 515567616 bytes. BTW I am on FF 126.0