Update README.md

Author: atinux

README.md

@@ -32,7 +32,7 @@ Browser extensions for [Vue Telescope](https://vuetelescope.com): available on C
 
 ### Firefox
 
-1. [Download the extension (.zip)][download-extension-link]
+1. [Download the extension (.zip)][download-extension-firefox-link]
 2. Enter `about:debugging` in the URL bar
 3. Go to "This Firefox" section
 3. Click on "Load Temporary Add-on" and select the zip