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Using Java with Firefox & Internet Explorer

by flingwing / July 24, 2010 10:06 PM PDT

I am using Windows XP and Firefox 3.8.6, the newest version.

I wanted to use a learning tool from a website. However, the message at that website said ?This page contains a Java applet that your browser is unable to display. Please go to to download free plug-in?
At that next page, the download is for Version 6 Update 21.

With all the ?known issues? in using Java, especially with Firefox, would updating my Java applet cause problems? Or should I try to update my MS Internet Explorer browser? I would have already done this if I were sure updating MS-IE would not also affect Firefox.

Both those browsers work fine right now. I?d hate to ?fix something that isn?t broken? but I would like to see and use that online training tool. Thanks.

Note: For convenience, below are some issues from the Mozilla website of using Java with Firefox. Do any of these appear to affect my wanting to update my current Java applet in Firefox?

Java Known Issues
? Support for the classic Java plugin has been dropped in Firefox 3.1a1 and later [Bug 435334]. Workaround: Use the Java Runtime Environment 6.0 Update 10.
? Firefox 3.0: If Java is uninstalled, the plugin finder service will not prompt to reinstall it [Bug 433502]
Microsoft Windows
? Remove any Java plugin files from your Plugins directory when installing a new JRE release (if present).
? To speed the Java plugin up on Windows, use the Java Control Panel to disable the Java icon appearing in the system tray, and disable the Java console.
? Using Adblock Plus or NoScript with Firefox 3.0 may cause crashes when loading Java applets [Bug 409566]
? The Java plugin may not work if HKLM\Software\\Mozilla\CurrentVersion is missing or inaccessible [Bug 400878, Sun Bug 6620045]

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Java issues...
by John.Wilkinson / July 25, 2010 2:35 AM PDT

Java is not really a per-browser plugin...installing it affects all browsers as well as standalone applications that use Java. However, upgrading is a safe and easy process that rarely causes any issues. The issues you listed are largely non-considerations and should not deter you from attempting to resolve the current issue by upgrading, something that can always be installed if necessary.

Hope this helps,

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What about Previous Versions Residing on the Computer?
by flingwing / July 25, 2010 8:00 AM PDT
In reply to: Java issues...

Thanks. I'll most likely try the upgrade.

Just one more question: at least one internet source wrote you should wipe previous Java scripts before loading a new one. Is this hassle true? Or are Java updates self-loading and made to take care of previous versions?

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Java versions...
by John.Wilkinson / July 25, 2010 10:21 AM PDT

The Java Runtime Environment does not handle upgrade installations well, usually installing the new version alongside the old version. Such is more of an inconvenience than anything, forcing you to uninstall the old version through the Control Panel to recover the space on your hard drive consumed by the previous installation.

Also, two quick notes regarding terminology for future reference:
1.) Java applets are embedded in/part of a webpage, not something you install or upgrade.
2.) Java does not have scripts, and Javascript is a separate language used for different purposes.

Hope this helps,

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(NT) Good stuff . . . thanks for the help!
by flingwing / July 25, 2010 10:28 AM PDT
In reply to: Java versions...
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