title: java.lang.NoSuchMethodError while creating a FirefoxDriver in java
body: <p>While trying to:</p>
  
  <pre><code>WebDriver driver=new FirefoxDriver();
  </code></pre>
  
  <p>I get the following error:</p>
  
  <pre><code>java.lang.NoSuchMethodError: org.openqa.selenium.Proxy.extractFrom(Lorg/openqa/selenium/Capabilities;)Lorg/openqa/selenium/Proxy;
    at org.openqa.selenium.firefox.FirefoxDriver.dropCapabilities(FirefoxDriver.java:313)
    at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:191)
    at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:186)
    at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:182)
    at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:95)
  </code></pre>
  
  <p>This problem started right after firefox on ubuntu updated to 32.0 version, I tried to install version 28.0 but still didn't worked.</p>
  
  <p>Any ideas?
  Thanks in advance</p>
  
  <p>After changing drivers version to 2.39 like <strong>curiosu</strong> said, a new error shows:</p>
  
  <pre><code> org.openqa.selenium.firefox.NotConnectedException: Unable to connect to host 127.0.0.1 on       port 7055 after 45000 ms. Firefox console output:
  pp-system-share:{2e1445b0-2682-11e1-bfc2-0800200c9a66} visible
  1409862347400   DeferredSave.extensions.json    DEBUG   Save changes
  1409862347400   DeferredSave.extensions.json    DEBUG   Save changes
  1409862347405   addons.xpi  DEBUG   Updating database with changes to installed add-ons
  1409862347405   addons.xpi-utils    DEBUG   Updating add-on states
  1409862347406   addons.xpi-utils    DEBUG   Writing add-ons list
  1409862347407   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-en-ZA@firefox.mozilla.org.xpi
  1409862347408   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-en-GB@firefox.mozilla.org.xpi
  1409862347408   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-ar@firefox.mozilla.org.xpi
  1409862348534   DeferredSave.extensions.json    DEBUG   Starting timer
  1409862348581   addons.manager  DEBUG   shutdown
  1409862348587   DeferredSave.extensions.json    DEBUG   Starting write
  1409862348587   addons.xpi  DEBUG   shutdown
  1409862348588   addons.xpi-utils    DEBUG   shutdown
  1409862348644   DeferredSave.extensions.json    DEBUG   Write succeeded
  1409862348644   addons.xpi-utils    DEBUG   XPI Database saved, setting schema version preference to 16
  1409862348645   addons.xpi  DEBUG   Notifying XPI shutdown observers
  1409862348649   addons.manager  DEBUG   Async provider shutdown done
  
  (process:3519): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
  
  (firefox:3519): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::sm-connect after class was initialised
  
  (firefox:3519): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::show-crash-dialog after class was initialised
  
  (firefox:3519): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::display after class was initialised
  
  (firefox:3519): GLib-GObject-WARNING **: Attempt to add property GnomeProgram::default-icon after class was initialised
  1409862349347   addons.manager  DEBUG   Loaded provider scope for resource://gre/modules/addons/XPIProvider.jsm: ["XPIProvider"]
  1409862349349   addons.manager  DEBUG   Loaded provider scope for resource://gre/modules/LightweightThemeManager.jsm: ["LightweightThemeManager"]
  1409862349352   addons.xpi  DEBUG   startup
  1409862349354   addons.xpi  INFO    Mapping ubufox@ubuntu.com to /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/ubufox@ubuntu.com
  1409862349354   addons.xpi  INFO    Mapping {2e1445b0-2682-11e1-bfc2-0800200c9a66} to /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{2e1445b0-2682-11e1-bfc2-0800200c9a66}
  1409862349355   addons.xpi  INFO    Mapping langpack-en-ZA@firefox.mozilla.org to /usr/lib/firefox/browser/extensions/langpack-en-ZA@firefox.mozilla.org.xpi
  1409862349355   addons.xpi  INFO    Mapping langpack-en-GB@firefox.mozilla.org to /usr/lib/firefox/browser/extensions/langpack-en-GB@firefox.mozilla.org.xpi
  1409862349355   addons.xpi  INFO    Mapping {972ce4c6-7e08-4474-a285-3208198ce6fd} to /usr/lib/firefox/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}
  1409862349355   addons.xpi  INFO    Mapping langpack-ar@firefox.mozilla.org to /usr/lib/firefox/browser/extensions/langpack-ar@firefox.mozilla.org.xpi
  1409862349356   addons.xpi  DEBUG   Ignoring file entry whose name is not a valid add-on ID: /tmp/anonymous3480147629030289426webdriver-profile/extensions/webdriver-staging
  1409862349356   addons.xpi  INFO    Mapping fxdriver@googlecode.com to /tmp/anonymous3480147629030289426webdriver-profile/extensions/fxdriver@googlecode.com
  1409862349357   addons.xpi  DEBUG   checkForChanges
  1409862349363   addons.xpi  DEBUG   No changes found
  1409862349367   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-en-ZA@firefox.mozilla.org.xpi
  1409862349367   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-en-GB@firefox.mozilla.org.xpi
  1409862349368   addons.xpi  DEBUG   Registering manifest for /usr/lib/firefox/browser/extensions/langpack-ar@firefox.mozilla.org.xpi
  *** Blocklist::_preloadBlocklistFile: blocklist is disabled
     JavaScript error: chrome://browser/content/urlbarBindings.xml, line 677: aUrl is undefined
  
      at org.openqa.selenium.firefox.internal.NewProfileExtensionConnection.start(NewProfileExtensionConnection.java:118)
      at org.openqa.selenium.firefox.FirefoxDriver.startClient(FirefoxDriver.java:250)
      at org.openqa.selenium.remote.RemoteWebDriver.&lt;init&gt;(RemoteWebDriver.java:112)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:195)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:190)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:186)
      at org.openqa.selenium.firefox.FirefoxDriver.&lt;init&gt;(FirefoxDriver.java:99)
  </code></pre>
  
  <p>Solution: I finally managed to resolve the problem, I changed selenium webDriver version from 2.42.2 to 2.39.0 and downgraded firefox version from 32.0 to 28.0</p>