Solved Firefox 15 and Java 7, applets won't load

[songbird2192]

Hey, people, the name pretty much says it all. I'm on Firefox's beta channel so I'm running Firefox 15 (x32)
This information from the Java console (which I've noted other people have problems with but comes up for me just fine) will tell you what versions the bits are of Java:
Java Plug-in 10.5.1.255
Using JRE version 1.7.0_05-b06 Java HotSpot(TM) Client VM
From the link in the Control Panel: Java Standard Edition Version 7 Update 5 (x32)

Everything about the version of Java I have installed works except the actual function of the script on web pages. When I try the test on the Java website, I get "ClassNotFoundException" when I click for details. Any ideas as to why? My dad suggested downgrading Firefox back to 14 so I might try that if I can't get it to work in 15.

Thanks!

 

[A Guy]

Welcome to Seven Forums songbird2192. What does the Firefox plugin checking page say?

Firefox Web Browser

You have confirmed the plugin is enabled?

Tools> Addons> Plugins

A Guy

 

[songbird2192]

Yep

It says it up to date, and the plugin is enabled.

 

[A Guy]

I can find no instances of others complaining that FF15 has this issue, so it seems to be limited to your PC. I did find this, which may not apply, but it's worth seeing if you have these dlls, as this is an older version/thread.

A fix for Java applets not loading in Firefox - TechSpot Blog

A Guy

 

[mnh0011]

I just got a new laptop with Windows 7 Pro 64-bit. I installed Firefox 15 to get online.
I noticed that online Java applets didn't load. The version of Java that came with it
was 6.xx and was already disabled because it was a security threat. I updated to Java 7 U7.

The online applets then worked correctly for about a day
then again stopped loading. Java is enabled and up to date but nothing I try seems to
fix the problem. I keep getting a ClassNotFound Exception error.

I tried system restore but, as with every computer I've ever owned, it
didn't work, saying some unspecified file could not be accessed so the restore failed.

So I tried IE but the online Java apps don't load there either.

Does anyone have a clue on how to solve this most frustrating problem? TIA

 

[mnh0011]

Java apps won't load

I tried what A Guy mentioned in his last note. I found the one dll, npoji610.dll, but the other, npjpi160.dll, wasn't there. I did find a npjpi170_07.dll though.

So I copied and pasted them both to Program Files (x86)/Mozilla Firefox/search plugins, which was the closest I could find to what the article mentioned.

But it was all moot since the problem remains.

Any other ideas?

 

[Slartybart]

Have you tried uninstalling FF and Java?
There has been a flurry of development activity at FF (to solve a Flash related issue)

Make sure you download FF and Java from the authentic sites. Do Ff first, tehn Java (see notes re: versions below)

Firefox download page

There's a bit of discussion about Java security. You might want to try v1.6 instead of v1.7. I don't know if FF will complain, but you can download v1.6_u35 here.

I would try v1.6 first and if it works - stick with it until the smoke clears. If FF complains (after a fresh uninstall/re-install) then you'll have to go with v1.7
Java v1.7 download page

Also - use 32 bit Java for 32 bit browsers
if you do use a 64 bit browser, then you'll need both Java (32bit and 64bit)

Post back, good luck.

 

[mnh0011]

Hey, that seemed to work. The sites I visit with apps all load now after I did what you suggested. I'm using the Java 1.6. If things start to go crazy again I'll try the 1.7 version but for now . Thanks Slartybart.

 

[Slartybart]

@mnh0011: Glad to hear you got it working

Did you only rollback Java or did you also reinstall FF? The information might help another user fix a similar issue.

If you're satisfied that the issue is resolved, please mark this thread as solved at the top of the thread - thanks.

 

[mnh0011]

I uninstalled both FF and Java. Plus I went into the registry and deleted anything with Firefox or Mozilla in it, as well as anything with Java mentioned.

 

[mnh0011]

Ummm, I'm not seeing any 'Mark this thread as solved' link at the top of the page, or anywhere else on the page either.

 

[A Guy]

Ummm, I'm not seeing any 'Mark this thread as solved' link at the top of the page, or anywhere else on the page either.

I am having an Admin do it for you

A Guy

 

[rdilauro]

Java / Windows 7 / Firefox

After Hurricane Sandy helped burn out my motherboard, I went out and purchased a new desktop. It came with Windows 7. I have been using Mozilla Firefox 16.0.2 on my Windows XP machine. I had Java 7.9 running. I needed Java to run a parachat session.

Now on the new machine, the Java installs all work fine. But when I go to verify if Java is installed, it just spins away. Doesnt happen with IE or Chroms, just with
Firefox.

I could easily go to an earlier level of Firefox, but before I did that, I wanted to see if anyone else has had the same problem (as reported in the top of this thread)

 

[Slartybart]

Did you install the 32bit or 64bit java?

Java help center

Why should I uninstall older versions of Java from my system?

Which Java download should I choose for my 64-bit Windows operating system?

Sorry, I took FF and Java off my system when I experienced odd behavior, first Java, then FF. So I can't give you real-world advice.

Although, I reiterate the back level Java advice given in a previous post (current back level is now 6.37 instead of 6.35).

Bill

 

[rdilauro]

Java and Windows 7

I installed both versions to try them out.

I finally isolated the problem. It was with ZoneAlarm Firewall settings. I just shut the firewall off for a second, and everything worked. Turned it back on, things failed as before. So, now I just made sure all the applications were properly permitted in Zone Alarm.

(It was easier to uninstall ZoneAlarm, then re-install it. DIdnt need to issue any specific access that way)

 

[Slartybart]

Ok, the way I understand Java is
A 32bit browser - a 32bit Java
A 64bit Browser - a 64bit Java
Use both - need both

Most people use a 32bit Browser - you have to specifically launch 64bit broswers
- or in the case of FF install it and launch it

ZoneAlarm..... why didn't you say you had ZoneAlarm?
All joking aside. please fill in your system specs on the forum, someone might have picked up on that (someone else, not me... maybe eventually, but not at first) and given you a quicker answer

Click on the Easy system specs in my signature and run the tool - it does all the work for you so you don't have to type much. The tool doesn't always get the make and model correct - please enter that manually and specify whether you have a desktop or laptop.

Very good tech sluething and thanks for posting your resolution. I'll keep ZoneAlarm tucked away as a soultion on other communication issues.



Bill
.