I can no longer open a new tab by clicking on it or by using file and new tab menu, so what do I change or reset for new tabs to work?

The tabs were working fine, but now tabs will not open when I click on the 'open a new tab + ' button, or if I go to 'file, new tab'. A new tab only opens when I click a link, but I cannot open a tab at will to start a new page. I used your troubleshooting data, but it did not help. I checked tabs settings in Options and all is checked, and I even reinstalled firefox. What do I do to reset or change settings so the tabs will open?

There is a reported incompatibility between the Ask Toolbar and Firefox 3.6.13 that causes new tabs to not open. This problem needs to be fixed by Ask; they need to update their toolbar add-on for Firefox. Until the incompatibility is fixed by Ask, you can disable the Ask Toolbar or un-install it from your system.
*http://support.mozilla.com/en-US/kb/Uninstalling+add-ons
*http://support.mozilla.com/en-US/kb/Cannot%20uninstall%20an%20add-on
'''Other issues needing your attention'''
The information submitted with your question indicates that you have out of date plugins with known security and stability issues that should be updated. To see the plugins submitted with your question, click "More system details..." to the right of your original question post. You can also see your plugins from the Firefox menu, Tools > Add-ons > Plugins. 
 
*Adobe Shockwave for Director Netscape plug-in, version 11.5.9.615
**'''''Security release version 11.5.9.620 released 2011-02-08'''''
*Shockwave Flash 10.1 r85
**Several updates behins
**'''''Security release version 10.2.152.26 released 2011-02-08'''''
*Next Generation Java Plug-in 1.6.0_23 for Mozilla browsers
**'''''Security release version 1.6.0_24 released 2011-02-10'''''
#'''Check your plugin versions''': http://www.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#'''Update Shockwave for Director'''
#*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player.
#*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it).
#*When the download is complete, exit Firefox (File > Exit)
#*locate and double-click in the installer you just downloaded, let the install complete.
#*Restart Firefox and check your plugins again.
#*'''Download link and more information''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox
#'''Update the [[Managing the Flash plugin|Flash]] plugin''' to the latest version.
#*Download and SAVE to your Desktop so you can find the installer later
#*If you do not have the current version, click on the "Player Download Center" link on the "'''Download and information'''" or "'''Download Manual installers'''" below
#*After download is complete, exit Firefox
#*Click on the installer you just downloaded and install
#**Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
#*Start Firefox and check your version again or test the installation by going back to the download link below
#*'''Download and information''': http://www.adobe.com/software/flash/about/
#**Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
#**Use IE to go to the above site to update the IE ActiveX
#*'''Download Manual installers'''.
#**http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
#**Note separate links for:
#***Plugin for Firefox and most other browsers
#***ActiveX for IE
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org
#*Java Test: http://www.java.com/en/download/help/testvm.xml

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Can no longer open folders etc by double clicking them

I have suddenly lost the ability to double click on anything on the desktop and open it. Can now only open things using 'Finder'. It is not my mouse as I have tried another mouse that I know works and have the same problem. I have also tried first mouse on another Mac (running Tiger) and the doube-click works fine.
Two things have happened betewen being able to double click and not. These are :
1. Used a piece of SW called 'Singular' to try and remove duplicate files. Only tried it on one (small) folder and it crashed (useless). So chucked app in trash!
2. Connected (new) external hard disk via Firewire. Partitioned ext. disk and did a full system back up. All went OK.
I've changed mouse settings in Preferences - no difference, so changed them back again.
Any ideas please? Am about to upgrade to Snow Leopard and would prefer to identify any problems before I start.
Thanks
Patricia

Reset the SMC and PRAM, I'd recommend doing each reset 2X. Post back if the issue continues.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

I can no longer open iphoto. When I click on iphot the screen appears and the icon in the centre of the screen continues to rotate . No library or other item appears on the left.

I am no longer able to access iphoto. When I click on the icon. The screen opens but remains dark with the spinning icon continuing indefinately. In the light panel on the left hand side there is no list of albums or the library.

Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Repair Database. If that doesn't help, then try again, this time using Rebuild Database.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. (In Library Manager it's the FIle -> Rebuild command)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
Regards
TD

Can no longer open NY Times puzzles: "puz could not be opened, because an unknown error occurred.?

Since updating Firefox, I can no longer open the NY Times daily/Sunday puzzle in the program used for crossword puzzles. Older puzzles sall open.

If you have problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox program and save the DMG file to the desktop
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Trash the current Firefox application to do a clean (re-)install
* Install the new version that you have downloaded
Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data.
* http://kb.mozillazine.org/Profile_folder_-_Firefox

All of a sudden I can no longer open tabs by clicking "+" or right clicking on the tool bar. To open a new page, I have to open a whole newFirefox window. How can I fix this?

All of a sudden I can no longer open tabs by clicking "+" or right clicking on the tool bar. To open a new page, I have to open a whole new Firefox window. How can I fix this?
Also, Firefox crashes frequently. Is there a fix for this also?

Uninstall the Ask toolbar and it should work again. There is a compatibility issue with the Ask toolbar and Firefox 3.6 that prevents new tabs from being opened.
There are a couple of places to check for the Ask toolbar:
* Check the Windows Control panel for the Ask Toolbar - http://about.ask.com/apn/toolbar/docs/default/faq/en/ff/index.html#na4
* Also check your list of extensions, you may be able to uninstall it from there - https://support.mozilla.com/kb/Uninstalling+add-ons
For the second issue, the [[Firefox crashes]] support article may help.

All of a sudden I can no longer open a new tab using either the icon on the tab bar, the keyboard short cut or the File menu option. I can open a new tab ONLY by clicking on a bookmark or link.

All of a sudden I can no longer open a new tab using either the icon on the tab bar, the keyboard short cut or the File menu option. I can open a new tab ONLY by clicking on a bookmark or link

This issue can be caused by the Ask.com toolbar (Tools > Add-ons > Extensions)
Your system details show that toolbar in the user agent as AskTbAD2/3.12.2.16749
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Ever since I updated to Firefox 4.0, I can no longer open links in a new tab by holding ctrl and clicking the link. Any help?

Ever since I updated to Firefox 4.0, I can no longer open links in a new tab by holding ctrl and clicking the link. The only way I can open a link in a new tab is if I right click a link and select "open in a new tab" in the dropdown menu, but ctrl + click is so much easier and faster. Any clue how to fix this?

Some other users have fingered the Ask toolbar as the cause of this problem. You can try disabling or removing it here:
orange Firefox button ''or'' Tools menu > Add-ons > Extensions
Does that help?

I can no longer open new tabs, either by clicking on the icon or hitting control T. I have tried reinstalling.

I can no longer open new tabs, either by clicking on the plus sign or by hitting control T. I tried re-installing, but it didn't help.

Try uninstalling the Ask toolbar and it should work again. There is a compatibility issue with the Ask toolbar and the current version of Firefox.

All of a sudden I can no longer open new tabs.

I have been using Firefox for a long time with no problems. Today for the first time I can no longer open new tabs. I reloaded the program with the same results.

Disable or un-install the Ask Toolbar. There is a compatibility issue with the Ask Toolbar in Firefox 3.6.13 that Ask needs to fix:
*http://support.mozilla.com/en-US/kb/Uninstalling%20add-ons#w_how-to-disable-extensions-and-plugins
*http://support.mozilla.com/en-US/kb/Cannot%20uninstall%20an%20add-on
 
'''Other issues that need your attention'''
The information submitted with your question indicates that you have out of date plugins with known security and stability issues that should be updated. To see the plugins submitted with your question, click "More system details..." to the right of your original question post. You can also see your plugins from the Firefox menu, Tools > Add-ons > Plugins.
*Adobe PDF Plug-In For Firefox and Netscape "9.4.2"
**There is a new version of Adobe Reader available (version 10 or Reader X) that you may want to look into
**Your current version 9.4.2 is the most recent for Adobe Reader 9
**About Adobe Reader X (version 10)
***New Adobe Reader X (version 10) with Protected Mode was released 2010-11-19
***See: http://www.securityweek.com/adobe-releases-acrobat-reader-x-protected-mode
***If you want to update to Reader X, follow the instructions below
*Shockwave Flash 10.1 r102
**'''''Security update released 2011-02-08'''''
*Next Generation Java Plug-in 1.6.0_22 for Mozilla browsers
**1 update behind; version 1.6.0_23 is a stability update according to Sun/Java
#'''Check your plugin versions''': http://www.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#'''Update Adobe Reader (PDF plugin):'''
#*From within your existing Adobe Reader ('''if you have it already installed'''):
#**Open the Adobe Reader program from your Programs list
#**Click Help > Check for Updates
#**Follow the prompts for updating
#**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below
#*Download complete installer ('''if you do NOT have Adobe Reader installed'''):
#**Use the links below to avoid getting the troublesome "getplus" Adobe Download Manager and other "extras" you may not want
#**Use Firefox to download and SAVE the installer to your hard drive from the appropriate link below
#**Click "Save to File"; save to your Desktop (so you can find it)
#**After download completes, close Firefox
#**Click the installer you just downloaded and allow the install to continue
#***Note: Vista and Win7 users may need to right-click the installer and choose "Run as Administrator"
#**'''Download link''': ftp://ftp.adobe.com/pub/adobe/reader/
#***Choose your OS
#***Choose the latest #.x version (example 9.x, for version 9)
#***Choose the highest number version listed
#****NOTE: 10.x is the new Adobe Reader X (Windows and Mac only as of this posting)
#***Choose your language
#***Download the file, SAVE it to your hard drive, when complete, close Firefox, click on the installer you just downloaded and let it install.
#***Windows: choose the .exe file; Mac: choose the .dmg file
#*Using either of the links below will force you to install the "getPlus" Adobe Download Manager. Also be sure to uncheck the McAfee Scanner if you do not want the link forcibly installed on your desktop
#**''Also see Download link''': http://get.adobe.com/reader/otherversions/
#**Also see: https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox (do not use the link on this page for downloading; you may get the troublesome "getplus" Adobe Download Manager (Adobe DLM) and other "extras")
#*After the installation, start Firefox and check your version again.
#'''Update the [[Managing the Flash plugin|Flash]] plugin''' to the latest version.
#*Download and SAVE to your Desktop so you can find the installer later
#*If you do not have the current version, click on the "Player Download Center" link on the "'''Download and information'''" or "'''Download Manual installers'''" below
#*After download is complete, exit Firefox
#*Click on the installer you just downloaded and install
#**Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
#*Start Firefox and check your version again or test the installation by going back to the download link below
#*'''Download and information''': http://www.adobe.com/software/flash/about/
#**Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
#**Use IE to go to the above site to update the IE ActiveX
#*'''Download Manual installers'''.
#**http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
#**Note separate links for:
#***Plugin for Firefox and most other browsers
#***ActiveX for IE
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org
#*Java Test: http://www.java.com/en/download/help/testvm.xml

I can no longer open any attachments that are sent to me. I click on and get cannot preview (but have had this for ages). I am clicking on download and nothing happens. It does not download. I clicked to install a new version after updating and clicking r

I can no longer open any attachments that are sent to me. I click on and get cannot preview (but have had this for ages). I am clicking on download and nothing happens. It does not download. I clicked to install a new version after updating and clicking repair. But still the attachments won't open including invoices I have received today. It is all attachments not just pdfs.

Angela Richens wrote:
It is all attachments not just pdfs.
Then most likely it is not caused by Adobe Reader.
Anyway, perhaps someone has some idea, if you give us some details: operating system, browser, email client, ...

Can no longer open two Firefox tabs, have close using Task Bar/Processes. Some links won't activate on websites. As per support suggestion,have backed up profile, deleted existing profile, removed firefox and replaced thingsetc

Can no longer open two Firefox tabs at the same time. Will disappear from screen but won't close - have to go to Task Bar/ Processes to close it, some links won't activate on websites. As suggested in the support area I have gone through the process of backing up my profile, deleted existing profile, removed firefox from computer, reinstalled profile in fresh folder, reinstalled firefox 6. I have done this twice for no effect - may work as it used to for a while (30mins) then gets back to its old tricks.
It is a bit irritating.

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
Did this fix your problems? Please report back to us!

I downloaded Yosemite on new iMac and now can no longer open spreadsheet files created using Excel for the iMac. I used to be able to do so on this new computer. What can I do?

I downloaded Yosemite on my new iMac and now can no longer open spread sheet files I created on my old iMac using Excel for the iMac. I used to be able to open these files on my new computer before Yosemite.

I downloaded Yosemite on my new iMac and now can no longer open spread sheet files I created on my old iMac using Excel for the iMac. I used to be able to open these files on my new computer before Yosemite.

I have several very important school related documents on my iPad in the Pages app. Ever since i updated to iOS5, i can no longer open any documents in Pages that I made before I updated. Please help

I have several very important school related documents on my iPad in the Pages app. Ever since i updated to iOS5, i can no longer open any documents in Pages that I made before I updated. Please help

Without the iPad connected, open up iTunes on your computer. Go to iTunes/Preferences/Devices and delete the backups that you're absolutely certain do not have the documents. Refer to figure below.
iTunes, select the iPad and then select the Summary tab. Follow directions for Restore and be sure to say "NO" to creating a backup. (You don't want to create a new backup that does not have the docs.) You will then be warned that all data (apps, music, movies, etc.) will be erased but, as the Restore finishes, you will be asked if you wish the contents of the backup to be copied to the iPad. This time, say "yes."
Repeat all of the above as required until you get the docs.

After my OS update I can no longer open email attachments. What could be the issue??

After my latest OS update I can no longer open email attachments. What might be in the issue??

Quit Mail and restart.
Select each of your mailboxes and select Rebuild under the Mailboxes menu.
If those don't help, then reinstall Yosemite:
Reinstall Lion, Mountain Lion, Mavericks or Yosemite without erasing drive
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Lion, Mountain Lion, Mavericks, or Yosemite
OS X Yosemite- Reinstall OS X
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

I have a client that uses Windows that has recently told me she can no longer open the PDFs I send her. I can't find this elusive "Always Send Windows-Friendly Attachments" setting that I have read may solve my problem. Can someone get me there?

I have a client that uses Windows that has recently told me she can no longer open the PDFs I send her. I can't find this elusive "Always Send Windows-Friendly Attachments" setting that I have read may solve my problem. Can someone get me there?

Dear Dan,
It was from InDesign that I was creating the shared pdfs. I was one of two Mac drivers in a corporate sea of Win users and had to make the change I mentioned in order for the Win users to see my pdfs for review. The difference from what you appear to be doing was that were all on an MS Exchange Server so the files were shared over the company's Exchange Server e-mail system. However, some of these files occasionally went to outside users via regular e-mail and those people had no issues either.
So what I did was tested and worked for years.
You might look at the Adobe forums or Knowledge Base to see if that is a reported issue with newer version of CS. I was on CS2 when I was doing this, and the other Mac driver was on CS3 but had no problems either.
Some Win users I've talked to find a problem opening some pdfs (not mine) in general and found they had to open Reader first and them open the file from Reader's File menu. That most often happened if the client was using an outdated version of Reader.

I can no longer open a new tab by clicking on it or by using file and new tab menu, so what do I change or reset for new tabs to work?

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