Refer two posts down on how to move your /tmp folder to memory (tempfs).
Now symlink your Google Chrome (or Firefox) cache to /tmp (which resides in memory).
rm -rf ~/.cache/google-chrome
ln -s /tmp ~/.cache/google-chrome
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Ubuntu performance and security of /tmp
Remember to set the sticky bit as well as nodev, noexec and nosuid for /tmp. Here is a line in fstab and the meaning of these 3 taken from the mount man page: nodev Do Read more…