taking the chrome manifest's version

It seems to work on firefox 95 but stable compatibility is not yet confirmed. Furthermore FF is not the only browser to use the 'browser' namespace, there's also safari. A cross-compatible version is to be preferred.

Extensions/combined/popup.js

@@ -4,7 +4,17 @@ const config = {
   showAdvancedMessage: "Show Settings",
   hideAdvancedMessage: "Hide Settings",
   disableVoteSubmission: false,
+}
+
+ function initConfig() {
+  initializeVersionNumber();
+  }
 
+ function initializeVersionNumber() {
+  const version = chrome.runtime.getManifest().version;
+  document.getElementById('ext-version').innerHTML = 'v' + version;
+}
+  
   links: {
     website: "https://returnyoutubedislike.com",
     github: "https://github.com/Anarios/return-youtube-dislike",