FROST attack mitigation

See details here: `https://arstechnica.com/security/2026/05/websites-have-a-new-way-to-spy-on-visitors-analyzing-their-ssd-activity/` I suggest to add `dom.fs.enabled=false` --- P.S I didn't found how to submit this to you without github which owned by Microsoft evil corp, so exactly after i submit it, I will appear here as ghost. Thank you for your understanding!