Add-on Manager crashes or freezes Firefox 15.0

Ever since I (auto) upgraded to ver 15.0 yesterday, my Firefox browser is WRONG.
The Add-on Manager freezes the application entirely. Buttons and graphics are missing from pages, the scroll bar on the right hand size is solid black. I've tried resetting my installation, checking each plug-in and extension individually, but nothing is working.
Also, I cannot get rid of the "myBabylon English Toolbar" extension. I have it deactivated and it's greyed out because it's not compatible with 15.0 but there is no "delete" or "uninstall" option to get rid of it.
HELP

I have seen problems like this before that have stemmed from having malware on the computer. Have you tried running a virus scanner to see if that turns up anything? Two that I have found to work well are [http://www.malwarebytes.org/ Malwarebytes Anti-Malware] and [http://www.safer-networking.org/personal/free-download/ Spybot - Search & Destroy], both of which can be gotten for free on their websites. As for getting rid of the "myBabylon English Toolbar", try [https://support.mozilla.org/en-US/kb/Cannot%20uninstall%20an%20add-on?s=uninstall&r=0&as=s#w_uninstall-from-windows-control-panel uninstalling that from the Windows Control Panel].

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Thanks for the answer the-edmeister. I am aware that using 3.6 and 4.0 on the same profile breaks things. I don't do it and never have. In fact I don't use 3.6 at all. What's the point? The only reason I know that it happens with b10 is because I downloaded it just to see. I have been using exclusively pre versions for quite some time with little issue.
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I check for add-on updates manually already. I have all automatic updating turned off. Checking for updates does not fix the problem. I have no "button at the bottom of the Extension Manager window," that may be a Windows/Mac thing. The button for updating add-ons on Linux is at the top. It has a drop-down menu with various options, I assume that's what you mean?
This is a fresh profile. I'm using Linux. Done the profile business several times.
It turns out that the add-on manager will work correctly if I change the data in install.rdf to reflect the correct version, although it still seems to choke up, that is, slow down considerably, when I have over 30 add-ons installed. I have had to restart to get it to load twice, but at least it still loads. I have 37 enabled / 2 disabled right now. This is more than usual due to my experimenting, but thus far my theory is holding true.
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See:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.com/kb/Firefox+crashes
If you have submitted Breakpad crash reports then post the IDs of one or more Breakpad crash reports (bp-xxxxxxxx-xxxxxxxxx-xxxx-xxxxxxxxxxxx). 
You can find the IDs of the submitted crash reports on the about:crashes page. 
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See:
*http://kb.mozillazine.org/Breakpad (Mozilla Crash Reporter)
*https://support.mozilla.com/kb/Mozilla+Crash+Reporter

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Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
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Sounds like it is hanging when you exit and later try to restart Firefox.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
**Windows 7 Task Manager: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** http://kb.mozillazine.org/Firefox_hangs
** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
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**See the following for more information
*** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
*** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
*** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting
 
 
'''You need to update the following:'''
*Adobe Shockwave for Director Netscape plug-in, version 11.0
*Shockwave Flash 10.2 r152
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#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
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Firefox hangs when clicking "Options" on any add-on in the add-on manager.

After the latest update the add-on manager window hangs whenever i click on the options for any add-on. The main firefox window works fine, but i am unable to to go into the options for my add-ons. Moreover, my search engines keep rearranging and disappearing. I dont know if that's relevant, but I thought I should add it too.

I installed 4 different extensions ... when I click on addon manager and click any extension "options" the whole addon manger freezes up for me as well. I can't close or escape the window. I can open another browser window but the old window with the addon manager is frozen so I must use task manager to close.
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The newest version of firefox keeps crashing, and freezing. I can't figure out why.

I downloaded the latest version and suddenly it keeps crashing and freezing on me. Now I can't get it to load at all.

You can use one of these to start Firefox in Safe mode:
*On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
*On Mac, hold down the Options key while starting Firefox
*Help > Restart with Add-ons Disabled
*https://support.mozilla.org/kb/Safe+Mode
If you can start Firefox in Safe mode then try to disable hardware acceleration in Firefox.
*Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*https://hacks.mozilla.org/2010/09/hardware-acceleration/
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*bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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*You can open the about:crashes page via the location bar, like you open a website.
See:
*http://kb.mozillazine.org/Mozilla_Crash_Reporter
*https://support.mozilla.org/kb/Mozilla+Crash+Reporter
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Firefox 4 Add-on manager causes application to stop responding

I just upgraded from the latest updated of version of Firefox v3.0 to 4.0. When I try and use the new Add-on Manager, all of Firefox stops responding. Essentially nothing works. I click on Tools - Add-ons, the tab opens, I download a selected add-on, and then nothing happens, There is no indication that the add-on has installed. If I mouse click anywhere, including the menu items, minimize the window, or the close application buttons, nothing happens, The only way to close Firefox is to launch Task Manager and use "end task" function. Task Manager then tells me Firefox is not responding and do I want to send an error report to Microsoft. I copied the 4 dump related files in the Microsoft report before sending it. If any, or all, would be useful I will send them to a responsible party. If I start Firefox but do not try and do anything with add-ons, it seems to function correctly. Also any other running programs do not seem to be affected.
I am running a desktop with XP SP3 with all updates downloaded and installed as they are issued.

You can use this button to go to the Firefox profile folder:
*Help > Troubleshooting Information > Profile Directory: Open Containing Folder
*http://kb.mozillazine.org/Profile_folder_-_Firefox
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
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Firefox 10 Add-Ons Manager does not open in a tab

In later versions of Firefox 9 and now Firefox 10, the "Add-Ons Manager" refuses to open in a tab. Instead, it opens as a window with no border that will not move and cannot be moved or closed except by closing it from the Start Bar at the bottom of the screen.
This occurs on 2 separate PCs, one running Vista, one running XP.
I know it should open as a Tab, but I see no way to do this.
Do I need to change some setting to get it to open properly?
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updates 9 and 10 have caused me problems as well with add ons and the extra tab appearing welcoming me to firefox.
With update 10 all my add ons disappeared.. upon going to tools /add ons I found half my add ons were incompatable and the others were closed! I just opened them again and all was fine. Luckily the add ons I use often were still compatable.
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Firefox crashes or freezes unexpected while watching/using flash contents

Firefox crashes or freezes unexpected while watching/using flash contents. Particularly, when I need any flash content. It freezes up so that the only option will be to force quit the firefox.

I've noticed the crashing increasing with the newer versions. The worst thing is when I'm writing a long email and then go to a page with flash and ff locks up and then crashes. I use IE now for most flash content or mission critical emailing but IE's interface is poorly laid out so I don't like it. I've tried FF with the plugin container and without it and it crashes either way (more often without the container). I use adblock and firebug. I wonder if ppl experiencing this prob are using those plugins too.

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see : [https://support.mozilla.org/en-US/kb/Using%20the%20QuickTime%20plugin%20with%20Firefox#w_installing-or-updating-quicktime Installing or updating QuickTime]
if you like read all the : [https://support.mozilla.org/en-US/kb/Using%20the%20QuickTime%20plugin%20with%20Firefox Using the QuickTime plugin with Firefox]
see also for info : [https://support.mozilla.org/en-US/kb/use-plugins-play-audio-video-games?redirectlocale=en-US&redirectslug=Using+plugins+with+Firefox Use plugins to play audio, video, games and more]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

After loading, why does adobe flash not show up in add on manager - using firefox 5.0

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shows up as shockwave not flash

Firefox keeps crashing and freezing

I am using Windows 8.1. Firefox either crashes or freezes multiple times/day.
Here are my crash reports:
bp-18337875-8976-461a-918a-59d732150331 3/31/2015 2:56 PM
bp-19e8ab81-f42b-4974-bf1b-a1dc62150331 3/31/2015 11:07 AM
bp-aeeca8d5-ce92-4ed9-b845-79f2b2150330 3/29/2015 11:47 PM
bp-f382c1ed-f6c1-482e-994f-621822150329 3/29/2015 7:12 PM
bp-479e7f78-7a5f-4081-bc05-b3f6d2150329 3/28/2015 8:11 PM
bp-4441afd7-d529-494b-b919-ebb7c2150328 3/28/2015 6:35 PM
bp-2e054407-4708-4cc0-9135-8beaf2150328 3/28/2015 12:47 PM
bp-9a402d4e-1bf0-42d1-975c-31e2e2150328 3/27/2015 8:36 PM
bp-4a6427f7-f9d8-44a3-9f51-3f3962150328 3/27/2015 8:35 PM
bp-16db9a8b-ab92-452d-a1e8-0161f2150327 3/27/2015 5:26 PM
bp-abfc8d38-bcab-47be-808a-ab0d12150327 3/27/2015 11:45 AM
bp-cca2020b-5c5a-453e-b7d5-aff772150326 3/26/2015 6:18 PM
bp-d6fda1df-1db2-4887-8016-42f8a2150326 3/25/2015 9:22 PM
bp-04b3842a-bad6-44b2-9c98-f47452150325 3/25/2015 2:45 PM
bp-87bc355d-fee9-4de4-b266-1ca5e2150325 3/25/2015 12:25 PM
bp-b0512e54-84c6-404c-8e5a-52b232150325 3/25/2015 10:36 AM
bp-444ca44a-6113-4c56-a290-629222150325 3/24/2015 11:23 PM
bp-42ca67be-65df-49cd-a25e-d05722150325 3/24/2015 8:44 PM
bp-39e7c1ae-cdb2-4bc9-80dd-899d62150324 3/24/2015 1:36 PM
bp-c315711d-00cb-404e-99be-66bad2150324 3/24/2015 11:57 AM
bp-31ffb01c-a22f-4d67-b2ee-207f7349de64 2/28/2015 9:09 AM
I have tried to set these 2 plugins to Never Activate, but everytime Firefox is restarted, they re-activate:
Cisco OpenH264 Video Codec
Shockwave Flash 16.0 r0

The five most recent crashes are coded OOM or "out of memory". This doesn't mean literally that every byte of memory was used, but that Firefox wasn't able to get a block of memory from Windows that suited its needs at the time. Your system memory use percentages were 67-81%, which are getting up there, but probably the bigger issue is how fragmented memory can get if you use many programs and go a long time between shutdowns.
I can't tell from the crash reports what Firefox was doing at the time it ran into memory problems, and it looks like you didn't enter any comments. Hopefully if you restart Windows this won't recur right away, but if it does, could you keep track of what was happening at the time to see whether that identifies a pattern or culprit?

Add-on Manager crashes or freezes Firefox 15.0

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