Searching for a "Java (TM) Platform plugin (Windows) for Firefox download" in 2026 is tricky because modern versions of Firefox the NPAPI technology required to run Java applets . Mozilla completely removed this support in late 2018 with Firefox 52 ESR being the last compatible release.
You can download the latest supported JRE directly from the official Java website . 2. Step-by-Step Installation Guide java (tm) platform plugin (windows) for firefox download
Locate a 32-bit version of Firefox 51 from the Mozilla FTP Archive . Disable Updates Immediately: Open your legacy Firefox. Type about:config in the address bar and press Enter. Searching for a "Java (TM) Platform plugin (Windows)
Search for app.update.auto and double-click it to set it to . Activate the Plugin: Click the menu (three bars) and go to Add-ons > Plugins . Type about:config in the address bar and press Enter
You need a 32-bit version of an older Firefox release, such as Firefox 51 or Firefox 52 ESR . Modern 64-bit browsers never supported the Java plugin.