How do you use this workflow? Do you ever get around to those 500 tabs? Whenever I get to ~30 I feel like it's time to figure out what my focus actually is and I'm always so baffled by people that operate like you do.
New issue? New i3 workspace with a new ff window and a new tmux session, which each accumulate tabs related to that issue. Workspaces can live for weeks or months and while each instance of ff rarely grows beyond 50 tabs, scale that across 10 workspaces and you've got a lot of tabs.
Yes, the 32gb ram in my work-workstation gets a workout.