Two things at play here: First, browser engines intentionally hold onto memory to re-use (they are allocating large-ish chunks at a time) until there is a Memor

Two things at play here: First, browser engines intentionally hold onto memory to re-use (they are allocating large-ish chunks at a time) until there is a Memory pressure Event. It‘s not leaked memory. Second, it sounds like you have quite a few addons running that each hold quite a bit of data in memory (like ad blockers). Try safe mode and see if behavior changes (though ads may now swallow quite a bit of memory now).