One thing I found is that Firefox doesn't do gc/cc that often on it's own. I keep a tab open to "about:memory" and click on "gc / cc / reduce mem" ever so ofte

One thing I found is that Firefox doesn't do gc/cc that often on it's own. I keep a tab open to "about:memory" and click on "gc / cc / reduce mem" ever so often and it keep the memory usage between 800MB and 1.2 GB with several tabs open (jira, slack, HN, misc other sites)