zlacker

Same applies to thousands of them, the "close everything" time just happens later in that case. I usually clean them up once Firefox starts slowing down, which is at tens of thousands.

With a good UI the unused ones just don't bother you anymore anyway until you scroll or filter them. They show me my train of thoughts without having to consciously organize anything. Unused tabs get unloaded from RAM anyway, so the cost of keeping them open is minimal.

A few years ago there was a version of Firefox that didn't slow down and opened quickly even at tens of thousands of tabs, but unfortunately it quickly regressed, so throwing everything out periodically is still inevitable:)