proper case convention after tags

Can't believe I did this. Out of 32 `[setup*` and  9 `[warning]` tags (excluding the readme), I let one capital letter get past me, the bastard!

user.js

@@ -941,7 +941,7 @@ user_pref("network.http.referer.XOriginPolicy", 1);
  * 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
 user_pref("network.http.referer.XOriginTrimmingPolicy", 0);
 /* 1605: ALL: disable spoofing a referer
- * [WARNING] do not set this to true, as spoofing effectively disables the anti-CSRF
+ * [WARNING] Do not set this to true, as spoofing effectively disables the anti-CSRF
  * (Cross-Site Request Forgery) protections that some sites may rely on ***/
 user_pref("network.http.referer.spoofSource", false); // default: false
 /* 1606: ALL: set the default Referrer Policy