Fix page load for proxied containers when Mozilla VPN isn't active

Remove the use of the proxy if Mozilla VPN inactive, still load page in the dedicated container

fix #2570

src/js/background/assignManager.js

@@ -198,6 +198,10 @@ window.assignManager = {
       return {};
     }
 
+    if (!MozillaVPN_Background.getInstallationStatus() || !MozillaVPN_Background.getConnectionStatus()) {
+      return {};
+    }
+
     // proxyDNS only works for SOCKS proxies
     if (["socks", "socks4"].includes(result.proxy.type)) {
       result.proxy.proxyDNS = true;