I can no longer open a new tab either by clicking on it or using the File/New tab command.

I used to be able to open a new tab by clicking on the plus sign to the right of already open tabs. For some reason this function has stopped working. I have also tried "File/New tab" with equal lack of success.

Try uninstalling the Ask toolbar and it should work again. There is a compatibility issue with the Ask toolbar and Firefox that prevents new tabs from being opened.

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I can no longer get firefox to print a web page. I am using the print command in the drop down 'file' menu

Can no longer print a web page. I use the drop down "fie" menu and the "print" command
the HP4180 series appears to recognize the command but delivers only a blank page

See if the solutions given in this artcile help: [http://kb.mozillazine.org/Problems_printing_web_pages Problems printing web pages]. Pay special attention to sections '''Prints to a small portion of the page''' and '''Does not print entire page content'''.

Suddenly I can no longer open my comcast email. I tried deleting cookies and emptying the cache, but neither helped. I can see the preview of the inbox, but not the whole inbox, and I cannot open any email. Help! I hate having to use IE!

When I click on "open entire inbox" the font seems to get very large briefly,then it returns to the normal size.I can't see my whole inbox or open anything!

When using Preferences to change the email to Xfinity Lite you loose certain valuable features available in the full verfsiion. This may work for some but I enjoy attaching photos in some emails and having them show in he message boz along with a message. It's a shame that two multi-national companys can't get their act straight. Comcast blames Firefox, Firefox blames Concast. In the meantime users are forced to use Internet Explorer. I hate this kind of stupidity. Millions of consumers are inconvenienced. I suspect that Microsoft and Comcast are schemeing in this matter.

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!

Tabs in Firefox 7 won't work...I can't open a new tab by clicking on the +.....only way to open a new tab is via the FILE/new tab option

Tabs in Firefox 7 won't work...I can't open a new tab by clicking on the +.....only way to open a new tab is via the FILE/new tab option...it seems like a lot of the options/buttons are non-pressable??

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 AskTbYLC/3.11.3.15590
See:
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

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.

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

How can i open a link in new window (shift + Mouse Click) while not switching to the new window

I want to open a new window (shift + Mouse Click) while not switching to the newly opened window. The focus should remain on the window from where i have opened the link.

You can do that with tabs, but not with windows AFAIK.

I can no longer open a new tab either by clicking on it or using the File/New tab command.

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