This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Java 8 101 and Firefox 48 (both 32 bit)- Plugin says it's not blocked but it doesn't work

more options

System is Windows 7, Firefox version 48 32 bit, java version 8 u101. After installing and allowing the java plugin to run, Java content still does not work. From the screenshot, you should be able to see that Java is not blocked and yet the area where the applet is on the confirm Java page is blank.

It works as expected under Internet Explorer after some prompting to run the applet. I get none of this in Firefox, and java is just silently broken with no apparent fix. Nothing I have read has helped. I have tried completely uninstalling both Java and Firefox, deleting the Java folder, deleting the Mozilla folder in AppData/Roaming, and reinstalling both. I've tried 64 bit Firefox and 64 bit Java as well with no better results. Is there a fix? Has Mozilla silently dropped support for Java in Firefox similar to Google and Chrome but still indicate it should work?

System is Windows 7, Firefox version 48 32 bit, java version 8 u101. After installing and allowing the java plugin to run, Java content still does not work. From the screenshot, you should be able to see that Java is not blocked and yet the area where the applet is on the confirm Java page is blank. It works as expected under Internet Explorer after some prompting to run the applet. I get none of this in Firefox, and java is just silently broken with no apparent fix. Nothing I have read has helped. I have tried completely uninstalling both Java and Firefox, deleting the Java folder, deleting the Mozilla folder in AppData/Roaming, and reinstalling both. I've tried 64 bit Firefox and 64 bit Java as well with no better results. Is there a fix? Has Mozilla silently dropped support for Java in Firefox similar to Google and Chrome but still indicate it should work?
Attached screenshots

All Replies (4)

more options

Type about:addons<enter> in the address bar to open the Add-ons Manager. Hot key; <Control>(Mac=<Command>) <Shift> A)

On the left side of the page, select Plugins. Make sure the ones you want to use are set to Ask or Allow.


Go to the web page. Once the page is loading, mouse to the address bar and Left click the icon. Select Permissions. In the menu, Make sure the ones you want to use are set to Ask or Allow.

more options

FredMcD said

Type about:addons<enter> in the address bar to open the Add-ons Manager. Hot key; <Control>(Mac=<Command>) <Shift> A) On the left side of the page, select Plugins. Make sure the ones you want to use are set to Ask or Allow.

Go to the web page. Once the page is loading, mouse to the address bar and Left click the icon. Select Permissions. In the menu, Make sure the ones you want to use are set to Ask or Allow.

The screenshot shows that Java has been enabled and is being allowed and yet the applet is not running. The attached screenshot shows the addons page.

more options

Java Deployment is permanently blocked because of security issues.

Java Platform is set to Ask To Activate. That is why you were asked. Please set it to Always Active.


Security Issue: Update your Flash Player Note: Windows users should download the active_x for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the active_x.

Flash Player Version: 22.0.0.209 Flash Player (Linux) Version 11.2.202.632

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download.

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download.


See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

more options

Could you check the settings in the Java Control Panel, Security tab, to confirm that Java is allowed to run in browsers. See: https://java.com/en/download/help/jcp_security.xml