JRE installed, but no Java in Firefox

Hey guys,
I am having a hell of a time trying to figure out what is wrong with my system. I have jre installed and i checked the plugin folder for mozilla and the plugin is there, but whenever I go to a site that requires java, it says that the plugin is not installed. I am running 32bit arch, so its not a 64bit issue. Do any of you know what might be wrong? Thanks.

I had the same problem on a newly installed system, too!
Not only Java, but also Flash do not work as a normal user!
After digging in, I found the permission of "/usr/lib/mozilla" is NOT accessible by a normal user,
so I changed the permission, and everything works!
But I wonder why this is going to happen?
Since I can not know which package creates this directory, I can not figure out if there is something wrong with some packages...
BR,
bsdson.tw

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[SOLVED] Openjdk installed, but no plugin for Firefox

Hello,
I installed openjdk using:
pacman -S openjdk6
but I don't see any plugin installed in /usr/lib/mozilla/plugin.
[root@univers ~]# ls -l /usr/lib/mozilla/plugins/
total 10360
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Thank you.
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After installing new Add-on,Firefox want me to restart to complete add-on installing,but when I restart firefox,add-on dissapears from Add-ons manager and won't install

After installing add-on,when Firefox ask me to restart to complete installation,in extensions folder it creates staged folder,but when i restart,this folder will removed and add-on not installed.
The Problem first happened when some extensions would not uninstalled and Firefox keep saying that addon will be uninstalled after restart,but nothing happen after restart.
So with following this instruction:
http://support.mozilla.com/en-US/kb/Cannot%20uninstall%20an%20add-on
After safe mode not worked either,I uninstalled extension with their IDs manually.After that I cannot install any add-on that needs restart.

This can be caused if one of the files that stores details of installed extensions is corrupt.
# Open your profile folder, for details of how to find it see https://support.mozilla.com/kb/Profiles
# Close Firefox
# Delete the following files if they exist, extensions.cache, extensions.rdf, extensions.ini and extensions.sqlite
# Re-start Firefox, it will then rebuild the list on installed extensions

I have the latest Adobe flash player installed but it does not show up in my add-ons or plug-ins on Firefox 3.6. In the plug-in check, it recognizes that the shockwave flash is up to date. How can I have the plug-in appear and be enabled on firefox?

I have uninstalled the flash player and installed it numerous times with no recognition by the Firefox plug-ins. I also have uninstalled Firefox and reinstalled it as well. I have also restarted my computer several times as well. The flash player is certainly installed but not working on Firefox. Thanks in advance for your help.

James j,
You have a different problem. Your screenshot shows "The Adobe Flash plugin has crashed".
See [[Plugin crash reports]] and [[The adobe Flash plugin has crashed]]. If you need more help you should [[ask a question|ask a new question]] (start a new thread).

I am trying to use screens and it keeps telling me it cannot detect Java even though I have installed and updated Java? What might be the problem?

I am trying to use "screenr" and it keeps telling me it cannot detect Java even though I have downloaded and updated Java? What is going on or what might I do to correct this?
Thanks

Firefox needs 32-bit plugins, so you'll need to install 32-bit Java for Firefox.
No, you can't change Firefox from 32-bt to 64-bit. There is a Nightly 64-bit version (alpha) of Firefox, but it is used only to test for regressions until development is resumed.

Programs like VIMEO say that adobe flash player isn't installed but it is isntalled

several videos try to play but say you have to install adobe flash player but I Have it installed in firefox. I look at the apps and its there and not disabled.

There are 2 versions of Adobe Flash:
*an '''ActiveX version''' for IE only
*a '''Plugin version''' for most other browsers including Firefox
*On a Windows system, you should always update both individually.
'''''You do not appear to have the Plugin version for Firefox installed. ''''' If you did, in Add-ons > Plugins you would see "Shockwave Flash ''(version)''". If "Shockwave Flash" is there and is disabled, click the "Enable" button.
Check your Plugins often --> http://www.mozilla.org/en-US/plugincheck/
*only the most popular/used Plugins are known by this page
*page will detect only installed, '''''enabled''''' Plugins
'''Install or update Adobe Flash''' 
#'''Using Firefox''', go to the following link and SAVE the download to your desktop so you can find it later. Un-check any items on that page that you do not want to download (i.e., "McAfee Security Scan Plus":
#*http://get.adobe.com/flashplayer
#When the download is finished, close Firefox (File > Exit '''''OR''''' Firefox button > Exit)
#Click or double-click on the file you just saved to your desktop
#*In the installation window that appears, click the box to the left of "I have read and...." to place a check mark in the box
#*The "Install" button in the lower right corner will now be highlighted, click it.
#*The installation is quick.
#Start Firefox and test your installation here: https://www.adobe.com/software/flash/about/
#To update/install the ActiveX version for IE '''''only''''', repeat the process, '''but use IE to go to the above website'''.
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
*Plug-in check --> http://www.mozilla.org/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
*Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

I update my browser to 7, but many sites write me that i use 3.5. Your site show me this messege to (You have old version). But i update my firefox yet. It is my problem :(

i update my browser to 7, but many sites write me that i use 3.5. Your site show me this messege to (You have old version). But i update my firefox yet. It is my problem :(

Your User Agent shows that you are using Firefox 3.5.2. Click on "More system details" to the right of your original question, scroll to the bottom and you will see the following:
*Your User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.4) Gecko/20091016 '''''Firefox/3.5.2''''' (.NET CLR 3.5.30729)
Reset your User Agent using the following instructions:
*See --> [https://support.mozilla.com/en-US/kb/websites%20or%20add-ons%20incorrectly%20report%20incompatible%20browser#w_reset-your-user-agent Reset your user agent] '''''and''''' [http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default Resetting your useragent string to its compiled-in default]
*What is a User Agent: http://en.wikipedia.org/wiki/User_Agent
*See --> [https://support.mozilla.com/en-US/kb/Finding+your+Firefox+version Finding your Firefox version]
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You may need to update some plug-ins. Check your plug-ins and update as necessary:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
*Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

When I open Firefox a message appears: Urgent! Your version of Firefox is no longer protected against online attacks. Get the upgrade - it's fast and free! I've tried downloading upgrade a few times, but when I open Firefox again, same message appears.

All the information is in the question above.

It is possible that your User Agent has been changed by something that you installed. Follow these instructions to reset your User Agent:
*[https://support.mozilla.com/en-US/kb/websites%20or%20add-ons%20incorrectly%20report%20incompatible%20browser#w_reset-your-user-agent Reset your User Agent]
*What is your User Agent: http://en.wikipedia.org/wiki/User_Agent
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You need to update some plug-ins:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

I can't install Java in Firefox. Intead Java works fine with IE. I preffer Firefox 4 but...I'm running Win 7 64-bit.

I;m running win7 64-bit and I can;t install Java in Firefox 4. Java works fine with IE.

On Java, I think we've covered the basics. There are a couple of other articles that might help:
[http://support.mozilla.com/en-US/kb/Java-related%20issues Java-related issues | Troubleshooting | Firefox Help]
[http://kb.mozillazine.org/Plugin_scanning Plugin scanning - MozillaZine Knowledge Base] (you would want to make sure it is ''not'' disabled; in about:config, filter on plugin.scan and see whether anything has been changed from its default)
On Norton, there are a number of recent threads here, but I have not been reading them. Hopefully someone has posted the answer.

Java installed but firefox is saying it is missing

I have tried to search for an answer to my problem but to no joy.
I use a website for work and there is a certain button i click which opens a popup and it says "A plugin is needed to display this content"
I have tried everything to get it to work , uninstalled Firefox, uninstalled all java related files on my computer, restarted computer and installed both again.
Is there anything i can do to get this to work.

Do you have the right things enabled on the Firefox Add-ons part? I do not know the default settings but for Java (both Platform and Deployment Toolkit) there are some options to choose (they are on the right side next to the Java). 
Java Deployment Kit has 2 options "Ask to activate" and "Never activate". 
Java Platform has 3 options: "Ask to activate", "Always activate" and "Never activate". 
If those are set to "Never activate", then that could be the cause of your problem?

How to find out jre version installed ,using a java program?

Hello,
Is there any way to find out the installed JRE version using a java program ?
The requirement is as follows:
There is a html page with 4 steps to install a software. each step is a link, which upon clicking does its work.
the first step is to install jre 1.4.2_11 if its not installed in the system. But how can i find out whether jre 1.4.2_11 is installed or not ?
Thanks in advance

For the hell of it... here is a list of properties you can query:
java.version Java Runtime Environment version
java.vendor Java Runtime Environment vendor
java.vendor.url Java vendor URL
java.home Java installation directory
java.vm.specification.version Java Virtual Machine specification version
java.vm.specification.vendor Java Virtual Machine specification vendor
java.vm.specification.name Java Virtual Machine specification name
java.vm.version Java Virtual Machine implementation version
java.vm.vendor Java Virtual Machine implementation vendor
java.vm.name Java Virtual Machine implementation name
java.specification.version Java Runtime Environment specification version
java.specification.vendor Java Runtime Environment specification vendor
java.specification.name Java Runtime Environment specification name
java.class.version Java class format version number
java.class.path Java class path
java.library.path List of paths to search when loading libraries
java.io.tmpdir Default temp file path
java.compiler Name of JIT compiler to use
java.ext.dirs Path of extension directory or directories
os.name Operating system name
os.arch Operating system architecture
os.version Operating system version
file.separator File separator ("/" on UNIX)
path.separator Path separator (":" on UNIX)
line.separator Line separator ("\n" on UNIX)
user.name User's account name
user.home User's home directory
user.dir User's current working directory

Designing Java Apps for Users Without a JRE Installed Yet

Hi, sorry if this post is in the wrong place, but here goes:
I'm designing a Swing Java application for a client. My client intends to distribute/sell this application.
I'm concerned because, chances are that at least one of the people he distributes this application to will not have the JRE installed and will thus be unable to run the application.
Can anyone give me some suggestions on ways I can make my application more convenient for users without the JRE currently installed? Even some kind of error message that would direct the user to the JRE download site would be okay.
kwikness
Edited by: kwikness on Dec 2, 2009 5:56 PM

Use NSIS and package your application with JRE.
Add your jar files to lib/ext of the JRE package.
NSIS can create a short cut (desktop/start menu) to launch java class/jar file
I would not use webstart unless you are sure that clients will have access to the internet, the bandwidth is not an issue and installing the new JRE is allowed (permissions, SLA, etc.)
Best regards.

I recently installed your new version of firefox but i still cannot see the security settingsfirefox is experiancing a problem will have to close down or how to control viruses etc and as your answer

all i want to know is how can i check for viruses etc using firefox and where can i find the security settings or are you doing that automatically,it has also crashed when i opened a vcl player

To downgrade to Firefox 3.6 first uninstall Firefox 4, but do not select the option to "Remove my Firefox personal data". If you select that option it will delete your bookmarks, passwords and other user data.
You can then install the latest version of Firefox 3.6 available from http://www.mozilla.com/en-US/firefox/all-older.html - it will automatically use your current bookmarks, passwords etc.
To avoid possible problems with downgrading, I recommend going to your profile folder and deleting the following files if they exist - extensions.cache, extensions.rdf, extensions.ini, extensions.sqlite and localstore.rdf. Deleting these files will force Firefox to rebuild the list of installed extensions, checking their compatibility, and reset toolbar customizations.
For details of how to find your profile folder see https://support.mozilla.com/kb/Profiles

Installed Adobe dlm add-on and now Firfox will not open. I see the process starting in Task Manager but no window opens. Unistalled Firefox then re-installed but still no luck. HELP ME!

''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/793259]''
I installed Adobe dlm add-on and now Firefox will not open. I see the process starting in Task Manager but no window opens. Unistalled Firefox then re-installed but still no luck. HELP ME! I do not want to use IE! I presume it has something to do with Adobe DLM as ever since then it is not working.

I had this problem for a couple weeks as well and it was extremely frustrating considering we use firefox for all our company tasks. Here is the solution:
First of all if you have no bookmarks you want to save, then go directly to step 7. If you want to save your bookmarks first, then follow these steps.
1. Shut down the computer
2. Reboot and open firefox
3. Go to Task Manager, right click firefox.exe, and click END PROCESS TREE
4. WAIT 30 SECONDS! Then Double-click the shortcut to try and open firefox again
5.Repeat steps 3 and 4 until firefox finally opens (trust me, eventually it will)
6. Once it finally opens, backup your bookmarks,
7. Download a copy of firefox from there website
8. Uninstall from programs menu and make sure to check the box REMOVE ALL COMPONENTS
9. install the new copy and BOOM! it works
If it doesn't work, you're an idiot. If you don't want to reinstall firefox, then you're out of luck. Good Luck!

JRE installed, but no Java in Firefox

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