After upgrading firefox it gets hung up on checking for compatibility add-ons and won't run

I still can't find an answer on any of the support forums and no one helped me when I asked yesterday, is there anyone that may have a clue as what I can do to fix this?
I updated my fire fox on my MAC OS X to 3.6.6 version of firefox, everything went smooth till I open FireFox then the window firefox update opens up and about 1/3 through the process it gets stuck on Checking Compatibility of Add-ons and doesn't go any further. I have hit cancel and firefox opens but it doesn't open any web sites. I have removed firefox and re-installed and it is still doing the same thing. I have also let it run over night thinking it may just take a while and it never progresses, please advise, I am new to MAC but FireFox is the only browser on my mac that will open one of my business pages, known issue with mac for this company.
== This happened ==
Every time Firefox opened
== upgraded ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16

Delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini) and compatibility.ini in the Firefox [[Profiles|profile folder]] to reset the extensions registry.
See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
If you see disabled extensions that are not compatible on the next start in "Tools > Add-ons > Extensions" then click the "Find Updates" button to do a compatibility check.
Mac: /Users/<user>/Library/Application Support/Firefox/Profiles/<profile>/

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On update to 4.0 Firefox locked up while checking for compatability of applications and will not load.

I have HP a6620f, Vista, 64 bit, 2.5 GHz 4.0 GB RAM. Firefox worked great until I upgraded to 4.0 when it locked up while checking for compatability of applications. I have the desktop ikon but firefox will not come up. Task manager shows firefox.exe using 50% of CPU when terying to come up.

I've since updated manually to 4.0.1, but haven't yet tried the full uninstall version, because I have to export plenty of settings first (and/or manually copy them). Also means I'd have to start from scratch with many customizations in No Script.
That said, I'll try the 'Safe Mode' option tonight, thank you :-)!
If I have to uninstall the whole shebang, I'd be more tempted to go back to 3.6.x until a few more of 4's teething problems (e.g. the messy print dialogues, particularly preview, which regularly doesn't even work) have been tackled.
Thanks-1M! for now - keep you posted.

After installing Firefox 12.0 now it freezes on "checking add-ons" and won't open

I got an update notice and installed Firefox 12.0. I installed and the program froze during "Checking Your Add-Ons" portion of the install. Now Firefox will not open. Keeps getting stuck on that same step of the install. Tried installing 4 different old versions of firefox and the exact same problem. I sit and wait up to 20 minutes and nothing happens, I just get an hour-glass for checking add-ons phase of install. I'm using windows 7.

It is possible that there is a problem with the file(s) that store the extensions registry.
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
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to check if there is a compatibility update available.
Also check for problems with the prefs.js file and a possible user.js file.
*http://kb.mozillazine.org/Preferences_not_saved
*https://support.mozilla.org/kb/Preferences+are+not+saved
You can create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Firefox takes a long time to load, even with add-ons and auto-update disabled

When opening firefox it takes a long time (1 minute +) to load. The computer does not display any indication that firefox is loading (often leading to 2, 3 or 4 instances of Firefox trying to start due to my impatience).
My OS is Windows Vista 32 bit
Firefox is v4.0.1

Can you check your Windows Firewall settings? It's possible that it's routing Firefox requests differently. At least one other Firefox user has reported that his Windows Firewall was set to block Firefox 3.6.

How can I disable: 1.the annoying "checking compatibility add-ons", and 2.: the "Getting started with Mozilla"page , every time I start Firefox?

I installed Google as my starting page, but I still get the Mozilla page first.

See these articles for some suggestions:
*https://support.mozilla.com/kb/Firefox+has+just+updated+tab+shows+each+time+you+start+Firefox
*https://support.mozilla.com/kb/How+to+set+the+home+page - Firefox supports multiple home pages separated by '|' symbols
*http://kb.mozillazine.org/Preferences_not_saved

After full TM restore to new HD, TM doesn't show older backups and won't run

Also will not perform a backup again because it says the backup is too large for the backup disk?
I can deal with backing up to a new external HD, but how can I find older file backups from this particular external drive?
Are they gone?
(the current external is partitioned. an older bootable backup that has a capacity of 250.39 GB with 171.96 available
and a TM partition that has a capacity of 749.34GB with 363.88GB available.)
I tried to change the partition in disk utility but i could only drag down the non-TM partition. It wouldn't let me add room to the TM partition.
Is this happening because the new internal HDD is larger than the previous HD?
Current capacity of internal is 999.86 with 606.3GB available.
There seems to be plenty of room to fit the above.
What's the deal?

The size of the partition for Time Machine depends on the size and amount on data on your hard drive. The general rule of thumb is Time Machine should have 2-4 times the amount of space as the data on your hard drive. There shouldn't be any problems with a partitioned drive. I'd also consider having 2 backups as hard drives do fail. Either another Time Machine backup or a clone and Time Machine. Since you are using Snow Leopard, a clone would probably be easier than constantly switching drives in System Preferences.
Clone - Carbon Copy Cloner (Often recommended as it has more features than some others)
Clone – Data Backup
Clone – Deja Vu
Clone - SuperDuper
Clone - Synk
Clone Software – 6 Applications Tested
Commonly Used Backup Methods

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ???

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ?????????????????

1st problem see http://kb.mozillazine.org/Firewalls
2nd problem, to close Firefox properly use File > Exit
:not with the [x] in upper right corner which close window
:see http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit
:if restarting use "Restartless Restart" extension as mentioned there.
<br><small>Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.</small>

After upgrade firefox does not ask for restart

On Linux Mint when Firefox is opened and meanwhile operating system package manager upgrades Firefox, then FF does not notify me that it needs restart.
I notice it since some extension stops working. Later I have checked package manager logs and see, that FF had been updated. Wasn't in older versions so that FF notified me that restart is needed for firefox?
Is it a bug or I have some setting missing. I need notification window be visible as long as user closes it or firefox is restarted...

Looks like that yea. I found out that for Ubuntu there is xul-ext-ubufox package which should do almost needed thing. I will install it into mint.
Integrates the browser with Ubuntu to:
* Enable searching for missing plugins from Ubuntu software catalog
* Add the following options to the Help menu - Get help on-line - Help
translating Firefox - Ubuntu Release Notes
* Set homepage to Ubuntu Start Page
* Display a restart notification after upgrading Firefox
* Add ask.com to the search engines.

After upgrading my software i have seem to have lost all my contacts and photos, i did a back up but i have no idea how to get them back on? maybe im illiterate but i dont know how to find it in my itunes? please help!!

After upgrading my software i have seem to have lost all my contacts and photos, i did a back up but i have no idea how to get them back on? maybe im illiterate but i dont know how to find it in my itunes? please help!!

http://support.apple.com/kb/HT5824?viewlocale=en_US&locale=en_US

I cannot connect after upgrading Firefox. I work in corporate environment and cannot change security settings. Why this feature was not tested before upgrading to current version?

I cannot connect to ANY web sites (for example, yahoo, google, etc.

[https://support.mozilla.org/en-US/kb/Cannot%20connect%20after%20upgrading%20Firefox Cannot connect after upgrading Firefox]
see also [https://support.mozilla.org/en-US/kb/Firewalls Firewalls]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Attachments dont work in yahoo after upgrading firefox

After upgrading firefox. I can non longer attach documents to yahoo emails.
If I switch to internet explorer as browser, I have no problem with attachments.

We make changes and improvements in each and every version. Your issue may be resolved with a simple update.
You can also try clearing cache and cookies:
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:
#Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
#Under "Time range to clear", select "Everything".
#Now, click the arrow next to Details to toggle the Details list active.
#From the details list, check ''Cache'' and ''Cookies'' and uncheck everything else.
#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!
Thank you.

After upgrading to 20.0.1 cannot open a new window (CTRL+N) and no add-ons seem to work (apart from adblock plus).

Unable to open new window (but able to open new tabs).
Sometimes unable to open Add-ons tab.
The add-on extensions do not seem to be working, even though they seem to be ENABLED (except adblock plus).
When restarting in safe mode, or disabling ALL add-ons the browser works normally, thus new windows open, add-on tab opens etc.
Tried to enable one thing at a time, but it seems that when enabling WHICHEVER TWO add-ons, firefox starts acting "weirdly" (no new windows etc.).
Tried disabling hardware acceleration, but it didn't solve the problem.
Tried uninstalling firefox and then reinstalling. At first it all seemed working perfectly well: new windows opened, extensions working etc. But after a couple of restarts (of firefox and computer) it all got back to the same situation.
Tried uninstalling ALL add-ons and everything worked well. After installing the SECOND add-on and restarting firefox things get "wrong" again.
It all started after upgrading to Firefox 20.0.1.

Hello,
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

After Upgrading Acrobat Reader XI to Acrobat XI Pro the previewer in Outlook and Windows Explorer doesn't work. I have to set the default program for .pdf's to Acrobat Reader inorder for the previewer to work.

After Upgrading Acrobat Reader XI to Acrobat XI Pro the previewer in Outlook and Windows Explorer doesn't work. I have to set the default program for .pdf's to Acrobat Reader in order for the previewer to work.
Can anyone recommend a solution?

If I set the default program for viewing PDF as Acrobat XI Pro the a PDF file will open with Acrobat XI Pro, but in Outlook I will get a white screen and the information bubble "This file cannot be previewed because there is no previewer installed for it" and in Windows Explorer I get a white screen in the preview pane.
My Acrobat version is 11.0.10
I am running Windows 7 Professional with Service Pack 1
My Internet Explorer is Version 11.0.9600.17691
Update Versions 11.0.17 (KB3032359)
I am running Microsoft Office 2013

Just updated to 8 & now I can't open any web pages & firefox is still running in the background after browser was closed. I uninstalled and reinstalled as well as disabled add-ons and plugins nothing has changed, can I downgrade back to on older version?

Just updated to 8 & now I can not open any web pages as well as firefox will not close out, it still running in the background after browser was closed. I uninstalled and reinstalled as well as disabled add-ons and plugins nothing has changed, can I downgrade back to on older version?

See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
See "Firefox hangs when you quit it":
*https://support.mozilla.com/kb/Firefox+hangs
A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.com/kb/Server+not+found
*https://support.mozilla.com/kb/Firewalls

Why have many of my add-ons and extensions been disabled after switching to firefox 6

Many of my add-ons and extensions have been disabled after switching to Firefox 6.
None of the Java extensions can be used;
my Microsoft frame is disabled;
my media player is gone;
and my google toolbar with all of my important bookmarks is missing.
How can Firefox 6 be considered an "upgrade"?
How can I '''retrieve Firefox 4 or 5'?''--there's no point in using a browser that limits so many necessary add-on sites!

Hi, mhaoo7--
Tried your plugins updating suggestion; no go.
Then tried updating to FF7.
This time the Yahoo! toolbar was no longer compatible with FF.
Scoured sites discussing problems with versions 6 & 7
and decided to retire to version 3.6.19.
Now both Google and Yahoo! toolbars are re-installed and
working....Only deficit may be that FF no longer supports or
soon will not support this version.
I have stashed all of my necessary bookmarks on Google's toolbar;
I like its drop-down menu as it doesn't change the page/window I'm
in the process of using;
I don't want to see that menu listed separately in a new window (too chaotic).
Same for the Google dictionary and Thesaurus, which are straightforward
and easy to use, again requiring nothing more complicated than a drop-down menu
to search for words and concepts.
--I checked Firefox 6 and 7's Dictionary/Thesaurus options but unfortunately
found none.
So if Firefox continues to upgrade with diminished returns, I'll likely have to go
to Google Chrome.
Would rather not do that.
Maybe I can keep FF 3.6.19 without incurring nasty repercussions.
Hope so.
Have enjoyed being with Firefox for a few years.
Thank you for your attention.
marlem388

After upgrading firefox it gets hung up on checking for compatibility add-ons and won't run

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