ref(SS_FF): Revert desktopSharingFirefoxMaxVersionExtRequired conversion

modules/RTC/ScreenObtainer.js

     obtainScreenOnFirefox(options, callback, errorCallback) {
         let extensionRequired = false;
         const { desktopSharingFirefoxMaxVersionExtRequired } = this.options;
-        let maxVersion = desktopSharingFirefoxMaxVersionExtRequired;
 
-        if (typeof maxVersion === 'number') {
-            extensionRequired = maxVersion === -1;
-            if (maxVersion >= 0) {
-                maxVersion = String(maxVersion);
-            }
-        }
-
-        if (typeof maxVersion === 'string') {
-            extensionRequired = !browser.isVersionGreaterThan(maxVersion);
-        }
-
-        if (extensionRequired) {
+        if (desktopSharingFirefoxMaxVersionExtRequired === -1
+            || (desktopSharingFirefoxMaxVersionExtRequired >= 0
+            && !browser.isVersionGreaterThan(
+                desktopSharingFirefoxMaxVersionExtRequired))) {
+            extensionRequired = true;
             logger.log(
                 `Jidesha extension required on firefox version ${
                     browser.getVersion()}`);

package-lock.json

       "dev": true
     },
     "js-utils": {
-      "version": "github:jitsi/js-utils#fa6eb93d1792b75e25bf84b97e51672e70d900de",
+      "version": "github:jitsi/js-utils#d4b78721b754a15c2588b7b0c621a9fff6fa1363",
       "requires": {
         "bowser": "1.9.1"
       }

package.json

     "async": "0.9.0",
     "current-executing-script": "0.1.3",
     "jitsi-meet-logger": "github:jitsi/jitsi-meet-logger#6fff754a77a56ab52499f3559105a15886942a1e",
-    "js-utils": "github:jitsi/js-utils#fa6eb93d1792b75e25bf84b97e51672e70d900de",
+    "js-utils": "github:jitsi/js-utils#d4b78721b754a15c2588b7b0c621a9fff6fa1363",
     "react-native-callstats": "3.27.0",
     "sdp-interop": "0.1.12",
     "sdp-simulcast": "0.2.1",