Fix Bug 1015660 - Firefox Privacy Notice - 3 links to non-existent pages, 2 "here" links, 1 typo

Pick up the latest changes to the legal-docs repo.
Merge pull request #2129 from kyoshino/bug-1015660-update-legal-docs

Fix Bug 1015660 - Firefox Privacy Notice - 3 links to non-existent pages, 2 "here" links, 1 typo