How do I remove the unwanted security message from the Firefox opening page?

Please update to Firefox 22 Update Firefox to the latest release

What security message is that?

In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

• Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V to paste all the information you copied into the forum post.

If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.

Thanks in advance for your help!

Application Basics

       Name
       Firefox

       Version
       21.0

       User Agent
       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0

       Build Configuration

         about:buildconfig

 Extensions

       Name

       Version

       Enabled

       ID

 Important Modified Preferences

     Name

     Value

       accessibility.typeaheadfind.flashBar
       0

       browser.cache.disk.capacity
       358400

       browser.cache.disk.smart_size.first_run
       false

       browser.cache.disk.smart_size.use_old_max
       false

       browser.cache.disk.smart_size_cached_value
       358400

       browser.places.smartBookmarksVersion
       4

       browser.startup.homepage_override.buildID
       20130511120803

       browser.startup.homepage_override.mstone
       21.0

       dom.w3c_touch_events.expose
       false

       extensions.lastAppVersion
       21.0

       gfx.direct3d.prefer_10_1
       true

       network.cookie.prefsMigrated
       true

       places.database.lastMaintenance
       1372259718

       places.history.expiration.transient_current_max_pages
       104858

       plugin.disable_full_page_plugin_for_types
       application/pdf

       privacy.sanitize.migrateFx3Prefs
       true

       privacy.sanitize.timeSpan
       0

       security.warn_viewing_mixed
       false

 Graphics

       Adapter Description
       Intel(R) HD Graphics Family

       Adapter Drivers
       igdumd64 igd10umd64 igdumdx32 igd10umd32

       Adapter RAM
       Unknown

       Device ID
       0x0102

       Direct2D Enabled
       true

       DirectWrite Enabled
       true (6.2.9200.16492)

       Driver Date
       1-27-2011

       Driver Version
       8.15.10.2291

       GPU #2 Active
       false

       GPU Accelerated Windows
       1/1 Direct3D 10

       Vendor ID
       0x8086

       WebGL Renderer
       Google Inc. -- ANGLE (Intel(R) HD Graphics Family)

       AzureCanvasBackend
       direct2d

       AzureContentBackend
       direct2d

       AzureFallbackCanvasBackend
       cairo

 JavaScript

       Incremental GC
       true

 Accessibility

       Activated
       false

       Prevent Accessibility
       0

 Library Versions

       Expected minimum version

       Version in use

       NSPR
       4.9.6
       4.9.6

       NSS
       3.14.3.0 Basic ECC
       3.14.3.0 Basic ECC

       NSSSMIME
       3.14.3.0 Basic ECC
       3.14.3.0 Basic ECC

       NSSSSL
       3.14.3.0 Basic ECC
       3.14.3.0 Basic ECC

       NSSUTIL
       3.14.3.0
       3.14.3.0

Security and privacy are not optional. Stand with a broad coalition to demand that the NSA stop watching us: stopwatching.us

oh that, how about changing your home page https://support.mozilla.org/en-US/kb/How%20to%20set%20the%20home%20page

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.