Enable Fuzzyfox
Fuzzyfox is a new timer mitigation technique currently in Nightly. https://bugzilla.mozilla.org/show_bug.cgi?id=fuzzyfox
There are some open issues on it that would be best to solve before enabling it by default, but this bug can serve as a tracker for either backporting it or evaluating it.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information