I hope this warrants its own thread.
Bug 131456: Memory use does not go down after closing tabs (resources not released). Status: RESOLVED FIXED. Current nightly trunk builds of Firefox 1.1 have this bugfix, meaning Firefox 1.1 final will have it also.
Bug 131456: Memory use does not go down after closing tabs (resources not released). Status: RESOLVED FIXED. Current nightly trunk builds of Firefox 1.1 have this bugfix, meaning Firefox 1.1 final will have it also.