The first thing you should try is to make sure that you have the latest Java.

Java security settings are set too high.

You are using outdated Java (below Oracle's security baseline).

If a web page with Java Uploader or Downloader displays correctly, but does not upload or download chosen files, this may mean two things: Traduzioni in contesto per 'install Firefox on Mac' in inglese-italiano da Reverso Context: Reinstall Firefox - see How to download and install Firefox on Mac for instructions. If you click the Allow now button, you will encounter this problem again when visiting other web pages that use Java. Firefox System Requirements Firefox 110.0.1 Windows Operating Systems (32-bit and 64-bit) Windows 7 or later Recommended Hardware Pentium 4 or newer processor that supports SSE2 512MB of RAM / 2GB of RAM for the 64-bit version 200MB of hard drive space Mac Operating Systems macOS 10.

When you click Allow and Remember Firefox adds the current webpage to an internal whitelist, whereby the Java applet will run automatically in the future without further intervention.

Firefox mac version