We finally got a viable replacement for Comcast internet. I changed the moment I was able to and couldn’t be happier. 1.2Gbps symmetrical connection for $85 a month. That plus YouTube TV is $70 cheaper than what I was paying Comcast for their garbage service that had constant outages. Before, the only options were mobile internet or Verizon DSL.
Go to about:config - find option browser.tabs.closeWindowWithLastTab - set to false. If you’re only using the close tab button, it will never close out of the program. If you’re closing a lot of windows using the window control though that won’t really help.