Firefox showing blank Screen while Running with Selenium Webdriver

Working with Selenium Web Driver  and Firefox for the first time is very easy but it becomes a challenge because of the common error which almost everyone face is that Firefox gets launched but it waits for some time with blank Screen and no URL is opened and it fails with below error.

org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
dd-on online-accounts@lists.launchpad.net installed in app-system-local
1416941874951    addons.xpi-utils    DEBUG    Make addon app-system-local:online-accounts@lists.launchpad.net visible
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874992    addons.xpi    DEBUG    Updating database with changes to installed add-ons
1416941874992    addons.xpi-utils    DEBUG    Updating add-on states
1416941874993    addons.xpi-utils    DEBUG    Writing add-ons list

(firefox:4105): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised
1416941876169    DeferredSave.extensions.json    DEBUG    Starting timer
1416941876196    DeferredSave.extensions.json    DEBUG    Starting write
1416941876316    DeferredSave.extensions.json    DEBUG    Write succeeded
1416941876316    addons.xpi-utils    DEBUG    XPI Database saved, setting schema version preference to 16
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:897 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.removeFolderChildren]
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:934 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.runInBatchMode]
************************************************************
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIAnnotationService.getItemsWithAnnotation]"  nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)"  location: "JS frame :: resource://app/components/nsBrowserGlue.js :: BG_EPDQI_runBatched :: line 1682"  data: no]
************************************************************
1416941876460    addons.manager    DEBUG    shutdown
1416941876461    addons.xpi    DEBUG    shutdown
1416941876461    addons.xpi-utils    DEBUG    shutdown
1416941876463    addons.xpi    DEBUG    Notifying XPI shutdown observers
1416941876467    addons.manager    DEBUG    Async provider shutdown done

(process:4152): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-button-images after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-password-hint-timeout after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-can-change-accels after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popup-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popdown-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-bar-popup-delay after class was initialised
1416941877193    addons.xpi    DEBUG    startup
1416941877197    addons.xpi    DEBUG    Ignoring file entry whose name is not a valid add-on ID: /tmp/anonymous6634144291667526254webdriver-profile/extensions/webdriver-staging
1416941877197    addons.xpi    DEBUG    checkForChanges
1416941877240    addons.xpi    DEBUG    No changes found

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised

    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:106)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:244)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:110)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:190)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:183)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:179)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:92)
    at org.openqa.selenium.example.Test.main(Test.java:16)
Exception in thread "main" org.openqa.selenium.WebDriverException: Failed to connect to binary FirefoxBinary(/usr/bin/firefox) on port 7055; process output follows:
dd-on online-accounts@lists.launchpad.net installed in app-system-local
1416941874951    addons.xpi-utils    DEBUG    Make addon app-system-local:online-accounts@lists.launchpad.net visible
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874992    addons.xpi    DEBUG    Updating database with changes to installed add-ons
1416941874992    addons.xpi-utils    DEBUG    Updating add-on states
1416941874993    addons.xpi-utils    DEBUG    Writing add-ons list

(firefox:4105): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised
1416941876169    DeferredSave.extensions.json    DEBUG    Starting timer
1416941876196    DeferredSave.extensions.json    DEBUG    Starting write
1416941876316    DeferredSave.extensions.json    DEBUG    Write succeeded
1416941876316    addons.xpi-utils    DEBUG    XPI Database saved, setting schema version preference to 16
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:897 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.removeFolderChildren]
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:934 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.runInBatchMode]
************************************************************
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIAnnotationService.getItemsWithAnnotation]"  nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)"  location: "JS frame :: resource://app/components/nsBrowserGlue.js :: BG_EPDQI_runBatched :: line 1682"  data: no]
************************************************************
1416941876460    addons.manager    DEBUG    shutdown
1416941876461    addons.xpi    DEBUG    shutdown
1416941876461    addons.xpi-utils    DEBUG    shutdown
1416941876463    addons.xpi    DEBUG    Notifying XPI shutdown observers
1416941876467    addons.manager    DEBUG    Async provider shutdown done

(process:4152): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-button-images after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-password-hint-timeout after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-can-change-accels after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popup-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popdown-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-bar-popup-delay after class was initialised
1416941877193    addons.xpi    DEBUG    startup
1416941877197    addons.xpi    DEBUG    Ignoring file entry whose name is not a valid add-on ID: /tmp/anonymous6634144291667526254webdriver-profile/extensions/webdriver-staging
1416941877197    addons.xpi    DEBUG    checkForChanges
1416941877240    addons.xpi    DEBUG    No changes found

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised

Build info: version: '2.33.0', revision: '4e90c97', time: '2013-05-22 15:32:38'
System info: os.name: 'Linux', os.arch: 'i386', os.version: '3.8.0-19-generic', java.version: '1.7.0_25'
Driver info: driver.version: FirefoxDriver
    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:118)
    at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:244)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:110)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:190)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:183)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:179)
    at org.openqa.selenium.firefox.FirefoxDriver.<init>(FirefoxDriver.java:92)
    at org.openqa.selenium.example.Test.main(Test.java:16)
Caused by: org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on port 7055 after 45000 ms. Firefox console output:
dd-on online-accounts@lists.launchpad.net installed in app-system-local
1416941874951    addons.xpi-utils    DEBUG    Make addon app-system-local:online-accounts@lists.launchpad.net visible
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874951    DeferredSave.extensions.json    DEBUG    Save changes
1416941874992    addons.xpi    DEBUG    Updating database with changes to installed add-ons
1416941874992    addons.xpi-utils    DEBUG    Updating add-on states
1416941874993    addons.xpi-utils    DEBUG    Writing add-ons list

(firefox:4105): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised
1416941876169    DeferredSave.extensions.json    DEBUG    Starting timer
1416941876196    DeferredSave.extensions.json    DEBUG    Starting write
1416941876316    DeferredSave.extensions.json    DEBUG    Write succeeded
1416941876316    addons.xpi-utils    DEBUG    XPI Database saved, setting schema version preference to 16
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:897 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.removeFolderChildren]
System JS : ERROR resource://gre/modules/BookmarkHTMLUtils.jsm:934 - NS_ERROR_UNEXPECTED: Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsINavBookmarksService.runInBatchMode]
************************************************************
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED) [nsIAnnotationService.getItemsWithAnnotation]"  nsresult: "0x8000ffff (NS_ERROR_UNEXPECTED)"  location: "JS frame :: resource://app/components/nsBrowserGlue.js :: BG_EPDQI_runBatched :: line 1682"  data: no]
************************************************************
1416941876460    addons.manager    DEBUG    shutdown
1416941876461    addons.xpi    DEBUG    shutdown
1416941876461    addons.xpi-utils    DEBUG    shutdown
1416941876463    addons.xpi    DEBUG    Notifying XPI shutdown observers
1416941876467    addons.manager    DEBUG    Async provider shutdown done

(process:4152): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-button-images after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-entry-password-hint-timeout after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-label-select-on-focus after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-can-change-accels after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popup-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-popdown-delay after class was initialised

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-bar-popup-delay after class was initialised
1416941877193    addons.xpi    DEBUG    startup
1416941877197    addons.xpi    DEBUG    Ignoring file entry whose name is not a valid add-on ID: /tmp/anonymous6634144291667526254webdriver-profile/extensions/webdriver-staging
1416941877197    addons.xpi    DEBUG    checkForChanges
1416941877240    addons.xpi    DEBUG    No changes found

(firefox:4152): GLib-GObject-WARNING **: Attempt to add property GtkSettings::gtk-menu-images after class was initialised

    at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:106)
    ... 7 more

The main reason is compatibility of Firefox web-driver and Firefox version installed on the System. So if your Firefox has been updated recently then also update your Web Driver version.

Current Version while writing this were:

Firefox Version: 30
Web Driver Version: 2.44

And it worked fine. So next time you find this issue. The first step is to match the Firefox version with the Web-driver Version of Firefox. 

Please do post your comments if it still doesn't solve the issue. There could be other cause of the problem which could help others.

Note: Disable the Auto Update Firefox option so that they don't get unsynced again.

Cheers !!!