Recent versions of Firefox have disabled much of CSS's control over :visited, as described in bug [https://bugzilla.mozilla.org/show_bug.cgi?id=147777 147777]. Is there any way to override this on my browser? In particular, I want CSS to be able to specify opacity for visited links. Alternatively, is there any way to get Firefox to treat my custom stylesheets as specially privileged, allowing local styles more power than sites' own styles? Currently I use [https://addons.mozilla.org/en-us/firefox/addon/visited-link-supporter/ Visited Link Supporter] as a workaround, but this is very unsatisfactory for a number of reasons -- it's buggy, for one thing. While I understand why someone might not want their browsing history tracked, I personally don't mind if sites track me, unless it impacts loading speed.