Problem with flash contents in Firefox

I never have this problem with earlier version of Flash 9 for
Firefox until the recent version upgrade. The videos always stopped
at about 3 seconds and no sound can be heard. IE works fine
though... Is there a fix or work aorund for this issue?...

Hello
it is all working for me.
http://support.mozilla.org/en-US/kb/Basic%20Troubleshooting
Please try point 4,6 and 8
Win 7 Ultimate x64 SP1
Firefox 12.0b6
Flash Player 11.3 beta 1 & 2

Similar Messages

Problem with flash player in firefox 12

Problem with flash 11.3 (beta 1,2) in firefox 12. Works in all other browser.
Screenshots
http://i.imgur.com/OZXvQ.png
http://i.imgur.com/VwUzk.png
http://i.imgur.com/XbXgV.png
http://i.imgur.com/dOT3w.png
http://i.imgur.com/aGgg8.png
Win 7 Ultimate SP1
Please fix

Hello
it is all working for me.
http://support.mozilla.org/en-US/kb/Basic%20Troubleshooting
Please try point 4,6 and 8
Win 7 Ultimate x64 SP1
Firefox 12.0b6
Flash Player 11.3 beta 1 & 2

Since upgrade to FF13: having problems with flash content, especially videos when scrolling/multi tasking--freezing the video and sound for 1-2 sec. Any advice?

At first, the same night I decided to update--things were fine but after using the browser hours later a second time: some flash scripts would simply not respond and freeze the tab the content is on or like in my question, constantly stutter. The problem for flash videos only seem to occur when I scroll onto links or when moving up/down a page. I encountered similar problem with FF7--like that time, I installed/uninstalled the flash player and even resetted firefox but to no avail--the problem persisted. It is also present while in safe mode. P.s. such problem is seemingly not present in other browsers which brought me to ask this question for assistance.

I have the same issue. When I scroll past embedded videos, such as YouTube videos, they are torn or disrupted. The video may shrink in size when I scroll, etc. Issues only arise when scrolling past the video. When playing, no issues.
I've tried the following that did not help:
Safe mode
Video driver up to date
Flash completely up to date
All plugins up to date.
Only started happening when I updated to FF13.

Problems with Flash plugin for Firefox

I've already tryed to install and uninstall adobe flash
player 9 for firefox several times (windows vista) but it keeps
having a problem:
some flash movies are not displayed complitely, if the movie
is 800x600 and i embed it into an html page with the same size,
when i open the page with firefox it is something like 600x400!!
If i open that page with Internet explorer or Opera there is
no problem!
here is the code i use to embed the movie:
quote:
<script language="javascript">
if (AC_FL_RunContent == 0) {
alert("This page requires AC_RunActiveContent.js.");
} else {
AC_FL_RunContent( 'codebase','
http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0','name ','container','width','800','height','600','align','middle','id','container','src','contai ner','quality','high','wmode','transparent','bgcolor','#393939','allowscriptaccess','sameD omain','allowfullscreen','false','pluginspage','http://www.macromedia.com/go/getflashplaye r','movie','container'
); //end AC code
</script>
<noscript>
<object
classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="
http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0"
name="container" width="800" height="600" align="middle"
id="container">
<param name="allowScriptAccess" value="sameDomain" />
<param name="allowFullScreen" value="false" />
<param name="movie" value="container.swf" />
<param name="quality" value="high" />
<param name="wmode" value="transparent" />
<param name="bgcolor" value="#393939" />
<embed src="container.swf" quality="high"
wmode="transparent" bgcolor="#393939" width="800" height="600"
name="container" align="middle" allowScriptAccess="sameDomain"
allowFullScreen="false" type="application/x-shockwave-flash"
pluginspage="
http://www.macromedia.com/go/getflashplayer"
/>
</object>
</noscript>

Thanks so much for your prompt response. I'll email the CBS
News website, and see if they will help.
Sincerely,
Kent Krueger

Problems with flash content (MySpace and other sites)

For the past few months I have been unable to view any media content on MySpace (videos, music) and a couple other sites. This is a real annoyance as I am a music reviewer and I can't listen to much of the music people want me to check out since it's usually on MySpace.
I've tried uninstalling Flash Player and reinstalling it. I also uninstalled and reinstalled Shockwave. Nothing works. I'm using Firefox 3.0.10 but it also fails to work on Safari. Works fine when I view the site on a PC.
I keep searching for answers and coming up with nothing but "Install the latest Flash Player" which I have...

I've tried uninstalling Flash Player and reinstalling it. I also uninstalled and reinstalled Shockwave.
Did you repair permissions and restart your computer afterwards? Make sure you have installed Flip4Mac, VLC Media Player and Perian.
Also, make sure you are using the latest version of Quicktime as well as Flash Player and Shockwave.

Problem with flash player in firefox

Hello !!!!!!
For those who know info, I have a problem going on a website www.techarena.in it shows me that it requires the Macromedia Flash player, so I installed it and it makes me mark the same thing. If there are people who can help me would be cool. I began to despair of not being able to go! Thank you in advance for your answers.
FYI, my firefox browser and the Flash player plugin installed. Is it the fact that 2 flash player are installed causing this problem??

Hello
it is all working for me.
http://support.mozilla.org/en-US/kb/Basic%20Troubleshooting
Please try point 4,6 and 8
Win 7 Ultimate x64 SP1
Firefox 12.0b6
Flash Player 11.3 beta 1 & 2

[FP 11.4 & FF 14.0.1] Firefox hang on every page with flash-content

Hi at all
I have a problem with the new Flash Player, let me explain it:
We have a windows-domain with software distribution via GPO.
Since update to 11.4 via the msi package (11.3 was previously installed) we have in the meanwhile 3 PCs (all Win7 x32 with FF 14.0.1 and Flash 11.4) with this problem:
- While loading a page with Flash content, the Firefox simply freezes and have to be killed together with plugin-container in order to work again.
If this happens, ff and plugin-container have 0% cpu-usage. It freezes and does nothing...
If I remove Flash: Web-pages are working, but without flash.
What I've tried:
reinstall using flash-uninstaller
Using "normal" end-user web-installer
Uninstall via Uninstaller and tried 11.3 again
reinstall Firefox, both 14 and 13
Nothing helped to bring Flash-support back.
This happens only on FF, Internet Explorer is working fine...
Can someone give me a hint?

Chris Campbell wrote:
The key here will be to determine what is different between the machines that work and those that hang. Of all the systems that fail, they are all Windows 7 32bit?
Yep, this issue only happens on Windows 7 32-bit machines, currently 6.
Do you have any 32bit systems that don't fail?
Yep, the most Windows 7 32-bit machines wont fail.
What about hardware, are there similarities here? Attached devices/drivers? Software that is running at the time?
These machines are all from DELL. They all have normal hardware, nothing special. Other machines from same type does not affected. Software: All have standard software distributed via Software-distribution (GPO). Only some PCs have special software, but it is not running. No special drives, too.
Maybe try booting Windows in safe mode to see if it still hangs?
Good idea, indeed - I will try this.
We're definitely interested in what's going on. I'll ask our security and Mozilla folks to see if they have additional clues.
Thanks!
EDIT:
Safe mode: Flash is working! (without disabled Protected Mode!)
I've set msconfig now to: Custom system start and deselected the boxes to load systemservices and system start elements.
So, now windows does a non-safe mode boot but no service or element was loaded except the drivers (right?). Flash is not working with this config!
So, whats the difference between safe mode and normal boot with minimal configuration (see attached picture).
Only drivers will be loaded, right? If so, I can exclude the network and graphics driver as source: graphics driver are updated right now and network was working in safe-mode.
Any new ideas?
Informations about safe-mode

Ongoing problems with Flash in Firefox 8

I am still having problems with Flash player since upgrading to Firfox 8 - see previous posts.
Symptoms:
When I try to access any flash containing page, the flash content does not load or play - the area it should be is blank or shrunk out - not even a token jpeg.
What I have tried:
Checked Flash is installed and enabled and up to date - all OK.
Tried re-installing Flash anyway - no effect.
Tried uninstalling flash and re-installing - this fixes the problem temporarily, but as soon as I shut down and restart, the problem returns.
Tried disabling other add ons - makes no difference. Only addon in this area is Freecorder toolbar.
Tried updating settings in Windows Firewall to ensure Firefox is allowed - no change.
Ensured my anti-virus/spyware program (PC Tools Anti-virus) is not blocking any of the websites - nothing there.
Checked situation in IE (Yuck!) - works fine there.

No response to this, and problem has not gone away. Looks like I am going to have to change browser....

Firefox hangs on all sites with flash content.

Firefox hangs on all sites with flash content. If I disable the flash plugin there is no hanging but obviously no flash content either. I have tried all the suggested actions found in the help sections for hanging and plugin problems. The Honda UK site listed below is one of many I am unable to access with flash enabled.
== URL of affected sites ==
http://www.honda.co.uk/

Chris Campbell wrote:
The key here will be to determine what is different between the machines that work and those that hang. Of all the systems that fail, they are all Windows 7 32bit?
Yep, this issue only happens on Windows 7 32-bit machines, currently 6.
Do you have any 32bit systems that don't fail?
Yep, the most Windows 7 32-bit machines wont fail.
What about hardware, are there similarities here? Attached devices/drivers? Software that is running at the time?
These machines are all from DELL. They all have normal hardware, nothing special. Other machines from same type does not affected. Software: All have standard software distributed via Software-distribution (GPO). Only some PCs have special software, but it is not running. No special drives, too.
Maybe try booting Windows in safe mode to see if it still hangs?
Good idea, indeed - I will try this.
We're definitely interested in what's going on. I'll ask our security and Mozilla folks to see if they have additional clues.
Thanks!
EDIT:
Safe mode: Flash is working! (without disabled Protected Mode!)
I've set msconfig now to: Custom system start and deselected the boxes to load systemservices and system start elements.
So, now windows does a non-safe mode boot but no service or element was loaded except the drivers (right?). Flash is not working with this config!
So, whats the difference between safe mode and normal boot with minimal configuration (see attached picture).
Only drivers will be loaded, right? If so, I can exclude the network and graphics driver as source: graphics driver are updated right now and network was working in safe-mode.
Any new ideas?
Informations about safe-mode

Firefox crashes on pages with Flash content

MacOS 10.6.5 on a 2008 MacBook Pro
Firefox 3.6.13
See below for Flash Player version info
Well I just updated to a new version of Firefox (3.6.13) and I had Flash Player 10.1 installed. Every time I open any web site with Flash content, Firefox crashes. This happens with Yahoo Mail, CNN, New York Times, etc. So I disabled Flash temporarily, and my Yahoo Mail no longer crashed. Of course I can't watch any online videos now....
I tried uninstalling Flash Player 10.1 using the Adobe uninstaller, and then re-installing it. No go. I tried the beta 10.2... still crashed. Finally I found a version of Flash 9 for Mac on Adobe's web site, and that does indeed work. Of course it's an older version, but at least I can use Firefox. The bad news is that the plugin is used by Safari also.
Any ideas?

I tried something else for now, since I'm using Flash Player 9 on my main system hard drive at the moment....
I have a bootable 48GB SSD in my ExpressCard slot. I often use it since it's faster. It has the same configuration of Firefox 3.6.13 and FlashPlayer 10.1, but it seems to have no problems. I right clicked a Flash animation and the hardware acceleration in on. Now why would it work on my SSD drive, but not my main hard drive?

Problem with Flash Player in IE7 / IE8

I'm stumped.
I've got a problem running Flash content in IE7 / IE8. I had
Adobe Master Suite CS3 installed on my laptop, and had no issues
running Flash content in any browser including IE7 when this was
installed. I've recently un-installed it and can no longer run
Flash content in IE7. I've tried re-installing Adobe Flash Player
from the Adobe website and, whilst the browser window is open, I
can run Flash contect with no issues. However, when IE7 is closed
and then re-opened, it stops running Flash content again. No errors
are experienced, just a black space or a "you must have flash
installed to view this content" message where the Flash content
should be. If I re-install again, I can view the content until I
close IE7. I've tried upgrading to IE8 but I'm getting the same
problem.
I have FireFox 3, Opera and Google Chrome installed also, and
have no issues playing Flash content in these browsers.
Please help!

All sorted now...
Removed Flash Player and its ActiveX control. Completely
reset IE8. Re-installed Flash Player 9. Now working.
Should have done this hours ago!

I have problem with flash on my MacBook Air 13 2013 with ML 10.8.5

The problem is that every time I want to display website with flash content (like youtube) I have kernel panic. The same situation is on firefox and Safari. On Google Chrome everything is working fine, but it has built in flash. I've tride to reinstall flash, remove it using adobe uninstaller, correct permissions etc. I've event tried to make new account on my computer but always it happens again. Video is trying to start, and I have kernel panic + restart the mashine. It's strange that I don't have this problem on my late 2012 mac mini with the same version of OS, browsers and flash. I'm confused... Can anybody help me with that?
Macbook has 3 days so I can say that it is clean OS. I've only installed Creative Cloud software, MS Office, and web browsers, so I think it's not the issue.

Interval Since Last Panic Report: 9662 sec
Panics Since Last Report:          2
Anonymous UUID:                    1139DF66-E417-0F90-6084-E600B2BBF29B
Sun Sep 29 09:27:47 2013
panic(cpu 2 caller 0xffffff80150b8945): Kernel trap at 0xffffff7f96a8a19f, type 14=page fault, registers:
CR0: 0x000000008001003b, CR2: 0x0000000000000008, CR3: 0x0000000017584000, CR4: 0x00000000001606e0
RAX: 0x0000000000000000, RBX: 0xffffff8027e9c000, RCX: 0x0000000001330000, RDX: 0x0000000014040000
RSP: 0xffffff80ffe6beb0, RBP: 0xffffff80ffe6bed0, RSI: 0x0000000000000000, RDI: 0x0000000000000010
R8: 0x0000000000000003, R9: 0x0000000000000000, R10: 0xffffff80ffe6bde0, R11: 0x0000000000000201
R12: 0x0000000000000000, R13: 0x0000000000000000, R14: 0x0000000000000000, R15: 0x0000000000000001
RFL: 0x0000000000010287, RIP: 0xffffff7f96a8a19f, CS: 0x0000000000000008, SS: 0x0000000000000000
Fault CR2: 0x0000000000000008, Error code: 0x0000000000000000, Fault CPU: 0x2
Backtrace (CPU 2), Frame : Return Address
0xffffff80ffe6bb50 : 0xffffff801501d636
0xffffff80ffe6bbc0 : 0xffffff80150b8945
0xffffff80ffe6bd90 : 0xffffff80150cebfd
0xffffff80ffe6bdb0 : 0xffffff7f96a8a19f
0xffffff80ffe6bed0 : 0xffffff7f96aae52c
0xffffff80ffe6bef0 : 0xffffff8015450e58
0xffffff80ffe6bf30 : 0xffffff801544f95a
0xffffff80ffe6bf80 : 0xffffff801544fa89
0xffffff80ffe6bfb0 : 0xffffff80150b3257
      Kernel Extensions in backtrace:
         com.apple.driver.AppleIntelFramebufferAzul(8.1.6)[8F074659-F84D-3303-8E40-F7726 C5A2B10]@0xffffff7f96a83000->0xffffff7f96ad8fff
            dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7f95b50000
            dependency: com.apple.iokit.IOPCIFamily(2.8)[2FAEA49C-EA4C-39C6-9203-FC022277A43C]@0xffffff 7f95608000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.7)[9928306E-3508-3DBC-80A4-D8F1D87650D7]@0 xffffff7f95bb5000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
12F37
Kernel version:
Darwin Kernel Version 12.5.0: Mon Jul 29 16:33:49 PDT 2013; root:xnu-2050.48.11~1/RELEASE_X86_64
Kernel UUID: B1B58405-A2B2-3C44-B25D-495053D52AB5
Kernel slide:     0x0000000014e00000
Kernel text base: 0xffffff8015000000
System model name: MacBookAir6,2 (Mac-7DF21CB3ED6977E5)
System uptime in nanoseconds: 420480990689
last loaded kext at 245365058089: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7f96e82000, size 65536)
last unloaded kext at 305477630406: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7f96e82000, size 57344)
loaded kexts:
com.avast.PacketForwarder          1.3
com.avast.AvastFileShield          2.0.0
com.rim.driver.BlackBerryVirtualPrivateNetwork          1.0.15
com.logitech.driver.LogiGamingMouseFilter          1
com.driver.LogJoystick          2.0
com.rim.driver.BlackBerryUSBDriverInt          0.0.97
com.apple.iokit.IOBluetoothSerialManager          4.1.7f2
com.apple.filesystems.autofs          3.0
com.apple.driver.AudioAUUC          1.60
com.apple.driver.X86PlatformShim          1.0.0
com.apple.driver.ApplePlatformEnabler          2.0.7d2
com.apple.driver.AppleUpstreamUserClient          3.5.12
com.apple.driver.AppleHDA          2.4.7fc2
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.1.7f2
com.apple.driver.AppleSMCLMU          2.0.3d0
com.apple.driver.AppleLPC          1.6.3
com.apple.driver.AppleIntelHD5000Graphics          8.1.6
com.apple.driver.AppleCameraInterface          4.08.1
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.4.5
com.apple.driver.AppleBacklight          170.3.5
com.apple.driver.AppleMCCSControl          1.1.11
com.apple.driver.AppleIntelFramebufferAzul          8.1.6
com.apple.driver.AppleUSBCardReader          3.3.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.driver.AppleUSBHub          623.4.4
com.apple.driver.AppleTopCaseHIDEventDriver          10.20
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.3.5
com.apple.driver.AppleAHCIPort          2.6.6
com.apple.driver.AirPort.Brcm4360          641.15.1
com.apple.driver.AppleUSBXHCI          630.4.5
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleACPIButtons          1.8
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.8
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.8
com.apple.driver.AppleAPIC          1.7
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2.1
com.apple.kext.triggers          1.0
com.apple.driver.DspFuncLib          2.4.7fc2
com.apple.iokit.IOAudioFamily          1.9.2fc7
com.apple.kext.OSvKernDSPLib          1.12
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.1.7f2
com.apple.iokit.IOAcceleratorFamily2          74.15
com.apple.iokit.IOSurface          86.0.4
com.apple.iokit.IOBluetoothFamily          4.1.7f2
com.apple.driver.AppleGraphicsControl          3.4.5
com.apple.driver.X86PlatformPlugin          1.0.0
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com.apple.driver.IOPlatformPluginFamily          5.4.1d11
com.apple.driver.AppleHDAController          2.4.7fc2
com.apple.iokit.IOHDAFamily          2.4.7fc2
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleSMBusController          1.0.11d1
com.apple.iokit.IONDRVSupport          2.3.7
com.apple.iokit.IOGraphicsFamily          2.3.7
com.apple.iokit.IOUSBHIDDriver          623.4.0
com.apple.driver.AppleUSBMergeNub          621.4.6
com.apple.driver.AppleThunderboltDPInAdapter          2.5.0
com.apple.driver.AppleThunderboltDPAdapterFamily          2.5.0
com.apple.driver.AppleThunderboltPCIDownAdapter          1.3.2
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com.apple.driver.AppleHIDKeyboard          170.2.4
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com.apple.driver.AppleMultitouchDriver          237.4
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com.apple.iokit.IONetworkingFamily          3.0
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com.apple.kec.corecrypto          1.0
Model: MacBookAir6,2, BootROM MBA61.0099.B00, 2 processors, Intel Core i5, 1.3 GHz, 8 GB, SMC 2.13f5
Graphics: Intel HD Graphics 5000, Intel HD Graphics 5000, Built-In, 1024 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E384A544D4C41522D4E544D
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AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x117), Broadcom BCM43xx 1.0 (6.30.225.29.1)
Bluetooth: Version 4.1.7f2 12718, 3 service, 21 devices, 3 incoming serial ports
Serial ATA Device: APPLE SSD SM0128F, 121,33 GB
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USB Device: BRCM20702 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x14300000 / 4
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Websites with flash content are causing tremendous CPU usage!!

Greetings!
I finally installed the long-awaited version 4 of firefox, and I am really disappointed. In addition to slight sluggishness now and again, it turns out that websites with Flash content (even those sites with a little flash advertising banner) are causing my CPU usage to really go up.
It's slowing down my machine, making my CPU fans spin loudly, and making for a disappointing web browsing experience.
I have disabled all add-ons, and done the usual. Even tried installing Chrome for the first time ever!
The problem is definitely Flash + Firefox 4.
I have created a brand new profile, but no dice. Wondering if anyone else experiences a high CPU load on pages with flash...

Adobe Flash Player has also been crashing periodically on 2 of my computers, I'm still running XP, one of them a powerful HTPC, Dell Optiplex 755 SFF over a new Cable Internet Connection. Buffering, Lagging, crashing when streaming video for Catchup TV (Freeview) via Firefox Adobe Flash Player Add-On, does not happen on Youtube though. Lagging & Crashing does NOT occur AT ALL in Google Chrome, but I hate that browser.
Have tried the usual disabling Flash Hardware Acceleration + Protected Mode, setting storage to Unlimited, disabling FF Ad Blockers + Hardware Acceleration, cleaning Caches, updating program versions, everything bar reinstalling programs. It's not happening in Chrome, why in Firefox?

Can't interact with any open windows, can't interact with flash content

I've already tried reinstalling, resetting and deleting my profile, nothing's changed.
I can't close any Firefox window by pressing "x", or by pressing Alt+F4, I can only close it through the task manager or task bar. Minimising or going into windowed mode is also impossible.
If a new window opens itself (e.g. A download) I can't interact with it at all - It's visible on top of the main window, but nothing I do affects it.
I also can't interact with flash content (like pausing a youtube video)
There is absolutely no feedback when I try. The icon doesn't change.
I recently reset firefox, there are no add-ons, themes etc. installed, the problem persists.
I am running Windows 7 64bit, everything else (including other browsers) appears to be working fine and a virus scan (Avast! free version) turned up nothing.
I'd really appreciate any help!

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. 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 Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Once you get the pop-up, just select "'Start in Safe Mode"''
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
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Flash content makes Firefox to freeze/crash

Hi Team,
I have posted my problem a few days ago as a comment (an answer) to the "flash plugin" post from "cj_gadget". But I have got no answer, probably because the "flash plugin" post was labelled as "solved".
So I now post my problem as a new question, and since I have a Macintosh configuration while "cj_gadget" (and many others) was using a Windows PC, the solution may be different!
After a long period without using it, my iMac (running with Mac OS X 10.6.8) has been recently updated with the most recent versions of Firefox (25.0) and Flash Player & Plugin (11.9.900.117). The result is that Firefox crashes (freezes) on every page with Flash content. For other reasons, I have to stay with Mac OS 10.6.8 without upgrading to more recent OS versions. I have looked through Firefox and Adobe Flash Player help pages, as well as through many posts on this forum without finding an effective solution.
Following some of these posts, I have unchecked (in Firefox > Preferences > Advanced) the use of hardware graphic accelerator. Many posts advise to do the same for Flash Player with a right click on the video frame, but this is NOT possible since Firefox freezes immediately as all Flash video start automatically when the page is loaded.
I have also checked that a HTML5 video displays correctly as for : "http://www.youtube.com/watch?v=cTl3U6aSd2w&html5=True" while "http://www.youtube.com/watch?v=cTl3U6aSd2w" stucks Firefox. This Firefox freezing problem is general for all pages with Flash content (that is for a large fraction of the Web!) and NOT limited to Youtube which was just used here as an example.
Some more information : RealPlayer was not present on this computer when the problem appeared. If I disable the Flash pluging in Firefox, it does nor freeze, but of course does not display the video. Safari (version 5.1.10 - ok for Apple software update) works fine with Flash content.
I have sent many hours on this problem without progress and would strongly appreciate any help or even better a solution !

Hi, jpdemers , and thanks for your advices.
I have been travelling for some time and was not in position to make any new test for about two weeks (the affected machine is an iMac at home).
Today I have uninstalled Firefox using AppCleaner, as well as Flash Player using Adobe uninstall_flash_player_osx.dmg ; and I have then installed both of them from scratch.
Unfortunately the problem is still there :-(
I just notice that I forgot to reboot the iMac (twice) as you said. I believe it may not be so important, but I will repeat the cycle with the reboots included (early next year now !).
I will keep you updated on the issue, and I hope I will not have to reinstall the system. I have the install discs, but this may be an heavy burden...
In the meanwhile, I wish you an happy new year !

Problem with flash contents in Firefox

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