Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

Feel free to reach us via the Jux support site, too.

I updated via the link my FireFox-plugin's: they are now all 'up-to-date' . But the problem is still exactly the same. What to do now? I'm not an I.E. lover.

This is not an answer but an addition: what worries me too is the fact that I can't reach the sign-in page of Jux (in FF): every time I search for Jux I directly go to my own account, the general startpage of Jux is impossible to get. Weird. Thanks for a reaction.

Check your Firewall/Antivirus not blocking the website.

Are you using proxy?

What error are you getting?

Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

1. Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
2. Under "Time range to clear", select "Everything".
3. Now, click the arrow next to Details to toggle the Details list active.
4. From the details list, check Cache and Cookies and uncheck everything else.
5. Now click the Clear now button.

Further information can be found in the Clear your cache, history and other personal information in Firefox article.

Did this fix your problems? Please report back to us!

I cleared my cache, history and cookies and then told CCleaner to do that too. But, I'm sorry to say: no changes. I still can't use Jux in FF.

An addition: as far as I know I don't use Proxies. Thanks anyway.

Try the Firefox Safe Mode to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• You can open the Firefox 4.0+ Safe Mode by holding the Shift key when you use the Firefox desktop or Start menu shortcut.
• Or use the Help menu item and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Don't select anything right now, just use "'Start in Safe Mode" To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again. If it is good in the Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one.

Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank I, I'm gonna try your advice. I now know it must be something in one computer, because when I use my laptop (also with FF) there's no problem! 'Start in safe modus' brings no improvement. I'm now going for the troubleshoot.

You can remove all stored data from a specific domain via "Forget About This Site" in the right-click context menu of an history entry (Show All History or History sidebar) or via the about:permissions page.

Using "Forget About This Site" will remove everything like bookmarks, cookies, passwords, cache, history, and exceptions from that domain, so be cautious and if you have a password or other data from that domain that you do not want to lose then make a note of those passwords and bookmarks.
You can't recover from that "forget" unless you have a backup of the affected files.

It doesn't have any lasting effect, so if you revisit such a 'forgotten' website then data from that website will be saved once again.

I re-initialised FireFox, but it didn't help. (Very sad.) Offcourse I restarted not only FF but also my computer. How can I reinstall the Old Firefox-things? They are now in a new map on Desktop. Thanks

See:

• https://support.mozilla.org/kb/Recovering+important+data+from+an+old+profile
• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

If you reset Firefox then a new profile is created and some of your data (bookmarks, passwords, cookies, form data) is automatically imported and your current profile will be moved to the desktop (Old Firefox Data).

If clearing cookies doesn't work then it is possible that the cookies.sqlite file that stores the cookies is corrupted.

Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookie files like cookies.sqlite-journal in the Firefox Profile Folder in case the file cookies.sqlite got corrupted.

• http://kb.mozillazine.org/Cookies
• https://support.mozilla.org/kb/Deleting+cookies

I'm now busy troubleshooting, which is a lot of work and it ain't easy. Wouldn't it be much easier to de-install and then re-install Firefox?

Thanks cor-el, but how do I get the Old Firefox data back in FF?

I think this is my last remark (concerning this topic). I de-installed en re-installed FF, but it did not change the fact that I can't use Jux. I can't add new posts, I can't log out, I can't share.( I can edit, yes, I can. )

Only solution: using I.E. So be it. Thank you, who tried to help.