Why can't I open a blank tab?

I cannot open a blank tab, when click on the '+' sign next to opened tab(s), a blank tab should open, but for me simply nothing happens, so what do I do to fix this?

Uninstall the '''''Ask Toolbar'''''. It can cause that problem.
*http://support.mozilla.com/en-US/kb/Uninstalling+add-ons
*http://support.mozilla.com/en-US/kb/Cannot%20uninstall%20an%20add-on
*http://kb.mozillazine.org/Uninstalling_toolbars
'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''
Not related to your question, but...
You need to update some plug-ins:
*Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
*Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
*Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

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Why can't I open a new tab? The + is there, but when I click on it, nothing happens. I've even tried File - New Tab. Still nothing!

Suddenly, I am unable to open a new tab. I can click on a link and open a tab that way, but if I want to open several sites on my own, I have to open a new browser. I've tried clicking the +, and clicking File - New Tab. Neither are working. I've even checked Tools - Options - Tabs. That didn't work, either. Please help!

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 AskTbLPY/3.12.2.16749
See:
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Why can't I open a new Tab with the "Plus" sign or "Command-T"?

If I want to open a New Tab, I either press "Command T" or select "New Tab" from the File menu, or click the little "plus" sign in my Tabs bar - - - right? None of them work. What am I missing?

This problem in is Firefox on your Mac?
May users have discovered this problem is caused by Conduit add-ons, such as a Conduit plugin and/or a "Community Toolbar" extension.
You can check for and disable extensions on the Add-ons page. Either:
* Command+Shift+a
* "3-bar" menu button (or Tools menu) > Add-ons
In the left column, click Extensions. Then, if in doubt, disable.
Often a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.
Does that help with the "+" button? If so, could you name the specific extension that caused the problem?
You might also check the Plugins section of the Add-ons page. You can use "Never Activate" to disable plugins that you don't ordinarily use.

Why can't I open a new tab for the same website? Want to disable 'switch to tab'.

I used to be able to open multiple tabs for the same website on Firefox 3.xx. I could download files from one tab and work from another. How can I disable the 'switch to tab' function?

You can disable it by using the Switch to Tab no more add-on - https://addons.mozilla.org/firefox/addon/switch-to-tab-no-more

Why can't I open and close tabs with scroll, after updating to Firefox 10???

I updated my Firefox, and opening or closing tabs whit scroll button doesn't work any more.

Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.org/kb/Safe+Mode
Your Firefox 9.0.1 is not the latest version anymore, so please update to the latest Firefox 10.0.x version via Help > About Firefox.

Why can I not open a new tab in the new Firefox? (via the + sign or Ctrl T)

In the new interface on Firefox (which started for me today ... May 2 ...), I cannot open a new tab via the "+" sign along the top or by using Ctrl + T. If I want more than one thing open at the same time, I need to open a "New Window", which doesn't make much sense. I don't necessarily want a bunch of windows but may need a few tabs open at the same time.

Hi bmail, I am attaching an illustration of cor-el's suggestion showing what it does since I wasn't aware of that before.

Why can't I open a new tab manually?

All of a sudden I am not able to manually open a new tab. It was working fine until yesterday. I click on the "plus" and nothing happens.

Hello maxkufan, start firefox in [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode#os=win7&browser=fx17 Safe Mode] and check it again, in Safe Mode window select '''''"Start in Safe Mode"''''' and see if this happen again,''''' if not '''''see: [https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#os=win7&browser=fx17 Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]
if the above is unhelpful then see: [http://kb.mozillazine.org/Corrupt_localstore.rdf Corrupt localstore.rdf], try the manual method.
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Why can't I open a new tab unless it is already in Bookmarks?t

When I click on the new tab + sign or File-New Tab I get nothing. If I tell a bookmark to open in a new tab, that works, but that's a pain.

This issue can be caused by the Ask.com toolbar (Tools > Add-ons > Extensions)
Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

Why can I not open a new tab using the New Tab button, going to File and clicking on New Tab or by pressing ctrl + T?

I am able to right click on a link and choose "Open in a New Tab."

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 AskTbGLSV5/3.12.2.16749
See:
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Why can't a open a new tab?

I click on the button or ctrl+T and nothing happens, but if i click a link on a page a new tab will open.

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 AskTbFWV5/3.12.2.16749
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Why can I not open a new tab?

I have three tabs open. There is the "+" tab to open a new one. When I click on this "+" tab or I select FILE->NEW TAB....then a new tab will not open. I am currently limited to three tabs.

The Ask Toolbar is causing that in the Firefox 3.6.13 version. Evidently something in that extension isn't compatible with a Firefox security fix. Disable that extension or un-install it.

Why can`t I open a new tab when I press + on a tab track, which is for opening new tabs?

it`s not working. new tabs open only when I click on a link. ctrl+T doesn`t function as well!

Uninstall 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.
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

Why can't I open a new tab?

Hello. This has happened reacently. I am clicking on the '+' symbol on the tab bar and no tab comes up. I have no more information, it is as simple as that.

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.

Why can't i open a new tab even if I press CTRL+T or click the new tab button under the toolbars?

Even if I click the new tab button, I don't get new tabs.......Please help..

The Ask Toolbar is causing that in the Firefox 3.6.13+ versions. Uninstall that extension.
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

I have lost the "+" on the tabs toolbar, so I can't open a blank tab. How do I fix?

I closed out a tab, and when the tab closed I also lost the "+" button on the toolbar. So I can no longer open a blank tab. It happened only once, but I can't figure out how to get the "+" button back.

You can find the New Tab button showing as a '+' on the Tab bar. 
You can open the Customize window and drag the New Tab button from the Tab bar on another toolbar and it will become a regular toolbar button like the New Tab button that you have in Firefox 3 versions. 
If you want the New Tab button at the far right end of the Tab bar then place a flexible to the left of it.
* New tab toolbar button: https://addons.mozilla.org/firefox/addon/new-tab-toolbar-button/
If toolbar items are missing then open the Customize window via "View > Toolbars > Customize" or via "Firefox > Options > Toolbar Layout" 
If a missing item is in the toolbar palette then drag it back from the Customize window on the toolbar 
If you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar set up.
See also:
* http://kb.mozillazine.org/Toolbar_customization
If the above steps didn't help then see:
* http://kb.mozillazine.org/Corrupt_localstore.rdf

Why can't I open a blank tab?

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