Heavy SSD Writes from Firefox
Chrome, on my system, is even more abusive. Watch the size of the .config/google-chrome directory and you'll see that it grows to multi-GB in the profile file.There is a Linux utility that takes care of all browsers' abuse of your ssd called profile sync daemon, PSD. It's available in the debian repo or [1] for Ubuntu or [2] for source. It uses `overlay` filesystem to direct all writes to ram and only syncs back to disc the deltas every n minutes using rsync. Been using this for years.  You can also manually alleviate some of this by setting up a tmpfs and symlink .cache to it.[1] https://launchpad.net/~graysky/+archive/ubuntu/utils
[2] https://github.com/graysky2/profile-sync-daemonEDIT: Add link, grammarEDIT2: Add link to source