diff --git a/docs/index.css b/docs/index.css
index 5e80a34..65097de 100755
--- a/docs/index.css
+++ b/docs/index.css
@@ -126,6 +126,7 @@ body {
     margin-bottom: 0.5em;
 }
 
+.download__ext[data-version]::after,
 .download__app[data-version]::after {
     color: var(--text-color-secondary);
     content: attr(data-version);
diff --git a/docs/index.js b/docs/index.js
index 3d5d470..565960f 100644
--- a/docs/index.js
+++ b/docs/index.js
@@ -70,6 +70,7 @@ function onResponse (res) {
         switch (asset.name.match(/.*\.(.*)$/).pop()) {
             case "xpi":
                 downloadExtBtn.href = asset.browser_download_url;
+                downloadExtBtn.dataset.version = res.tag_name;
                 downloadExtBtn.removeAttribute("disabled");
                 downloadExtBtn.removeAttribute("title");
                 break;