@Indy
One of the options you can check is for Firefox "To warn me when performance is affected by too many open tabs." Do you ever get that warning?
Bert, that sounds familiar, but if it actually came up I dismissed it a long time ago.
I just checked and my main browser window has 17 tabs pinned; that list changes over time as I add or subtract, but because life is heavily threaded right now, I leave a tab up when that is something there I am working, researching, watching, tracking, etc.
The tabs function kind of like Memory cache - stuff that is in play, in some variable state.
