Clarify version numbers in override

wiki/src/download.inline.mdwn

@@ -11,7 +11,7 @@
            Tor Browser <span class="minver-tor">5</span>+</p>
         <p>Copy and paste this link in Firefox or Tor Browser:</p>
         <code>https://tails.boum.org/download</code>
-        <a href="?override=firefox" class="btn btn-lg btn-primary browser-override">I'm already in Firefox or Tor Browser</a>
+        <a href="?override=firefox" class="btn btn-lg btn-primary browser-override">I'm already in Firefox <span class="minver-firefox">38.0.1</span>+ or Tor Browser <span class="minver-tor">5</span>+.</a>
       </div>
       <div class="col-md-6 bittorrent">
         <h2>BitTorrent</h2>
@@ -32,7 +32,7 @@
         Please update to Firefox <span class="minver-firefox">38.0.1</span>, Tor Browser <span class="minver-tor">5</span>, or newer and visit this link:</p>
         <p id="unsupported-other">Copy and paste this link in Firefox or Tor Browser:</p>
         <code>https://tails.boum.org/download</code>
-        <a href="?override=firefox" class="btn btn-lg btn-primary browser-override">I'm already in Firefox or Tor Browser</a>
+        <a href="?override=firefox" class="btn btn-lg btn-primary browser-override">I'm already in Firefox <span class="minver-firefox">38.0.1</span>+ or Tor Browser <span class="minver-tor">5</span>+.</a>
       </div>
       <div class="col-md-6 bittorrent">
         <h2>BitTorrent</h2>