We will never accept that it's unfixable! Never, accept that it's unfixable!

Read this thread and follow the instructions that rjohnson19 has posted:

https://support.mozilla.com/en-US/forum/1/706123?#threadId706192

Also read this about Flash:

http://support.mozilla.com/en-US/kb/The+Adobe+Flash+plugin+has+crashed?s=The+Adobe+Flash+plugin+has+crashed&as=s

"By default, if Flash is not responsive for 45 seconds, Firefox will terminate it and display The Adobe Flash plugin has crashed."

Nope. After 45 seconds of non-response from flash on my Linux Centos box, FF itself crashes and takes down the X-server with it.

Read what Alice Wyman has to say in the following and also look at cor-el's advice further down in that thread:

https://support.mozilla.com/en-US/forum/1/713600?#threadId719044

FF 3.6.6 is a HORROR and it is NOT only with Flash videos.

When I click on a link to download a binary file, FF grows to occupy as much as 300 MB of my 500 MB RAM! The CPU usages gets up to about 100 percent, and the whole computer freezes up/

This is happening on two different computers. One runs XP Home SP3 and the other runs XP Pro SP3.

I use an external download manager (Star Downloader Free 1.45). It works perfectly with Chrome and with SRWare Iron--which proves that there is nothing wrong with Star, because those browsers didn't exist when the current version of Star was released, and yet Star didn't need any fine tuning or finagling to work with them. Just put the npstar.dll plugin into the appropriate directory for each browser.

Clearly the problem is with FF.

Hello everyone.

It's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?

Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in safe mode (don't forget to select Disable all add-ons when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See this article for information about troubleshooting extensions and themes and this one for plugins.

If you need support for one of your add-ons, you'll have to contact its author.

If the problem is not disappears when all add-ons are disabled, please tell me, so we can work from there.

I have no technical information to add other than to echo the comment above that 3.6.6 is a horror. Memory usage is a nightmare. It gets up to over 1gb and I keep having to restart the browser. I am going to use IE8 until you fixed this..

Derek, please read the post right above yours. I hope that helps.

Three ideas that may help:

Option 1: Upgrade to FF 4.0 beta 1.

Option 2: Downgrade to FF 3.6.3.

Option 3: Download and install 4.0 beta, but don't run it. Just copy the file plugin-container.exe from the beta directory to the 3.6.x directory. Then go into about:config and set all the "dom.ipc" entries to True.

@ Neil

Upgrading to Firefox 4.0 beta is not recommended as it's missing features (like an add-on manager that works), has many bugs (like serious interface bugs that won't let you do what you want) and is not stable. Please wait until the final release of Firefox 4.0 to use it as a day-to-day browser.

Downgrading to Firefox 3.6.3 is not recommended, since it doesn't contain the latest security fixes. If you want to use an older version, please use 3.5.10, as it, like 3.6.6, contains all latest security fixes.

Please, everyone, read this post for help.

I just upgraded to 3.6.6. Firefox will not even finish starting up before it crashes - it crashes within 15 to 20 seconds of clicking the icon, every single time. OS X 10.5.8.

I have tried starting up in Safe mode and disabling all plug-ins. Still crashes immediately.

Advice? I guess I'm going to revert to 3.5.10. Or just switch to Safari (which was the inferior product... until now).

Can you please try it in a new (temporary) Firefox profile and see if the issue is still present? See this article to know how to create a new Firefox profile. Please report back the results.

I have actually already reverted to 3.5.11; I need to work and I need my browser to do it. (It's working fine, by the way.)

I assume I'd need to re-download 3.6.6 to do the test you describe above, yes? Also, I would need more instruction to do so - I'm not an advanced user. Am I supposed to remove the old profile, then create a new one? Just create a new one? If I only create a new one, what happens to the old one and how do I get Firefox to open with the new one rather than the old one? Etc.

And can I have two versions of Firefox installed at the same time - 3.5.11 and 3.6.6? I don't want to reinstall 3.6.6. and then have to remove it again to revert to 3.5.11.

Thanks!

Yes, if you don't have problems in Firefox 3.5, then you'd need to install Firefox 3.6.

If you need more detailed instructions than the ones at the article, please ask me specifically. The article is pretty detailed and easy to understand, even for unexperienced users. Often what gets to people is the terminology (what's the menu bar, what's the start button and that kind of stuff), so feel free to ask. You don't need, of course, to delete your own profile. You just create a parallel profile, see if it works, and go back to your old profile to fix it (if the new profile works, there's something I need to ask you to do, but first things first, and if it doesn't work, it's another story). In any case, do things at your own pace. I have this thread on an email subscription, so I should miss your posts, whenever you do them.

Oh, and you can have multiple versions of Firefox installed on the same computer. They will all run the same Firefox profile, unless you use the profile manager. For the profile manager, see:

http://support.mozilla.com/en-US/kb/Managing+profiles

This article explains it pretty clearly too:

http://www.htmlcenter.com/blog/multiple-firefox-installs/

Running FF 04B.0B2 it has same flash crash problem...(as did 04B.0B1)