title: FireFox API install extension
body: <p>How do I install, update, uninstall FireFox extensions on Windows?</p>
  
  <p>The article (<a href="https://developer.mozilla.org/en/Adding_Extensions_using_the_Windows_Registry" rel="nofollow noreferrer">https://developer.mozilla.org/en/Adding_Extensions_using_the_Windows_Registry</a>) seems like a legacy information...</p>
  
  <p>I have installed FireFox 3.6.3.
  However, I don't see "HKEY_LOCAL_MACHINE\Software\Mozilla\Firefox\Extensions" in my registry:</p>
  
  <hr>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\3.6.3 (en-GB)]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\3.6.3 (en-GB)\Main]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox\3.6.3 (en-GB)\Uninstall]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox 3.6.3]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox 3.6.3\bin]</p>
  
  <p>[HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla\Mozilla Firefox 3.6.3\extensions]</p>
  
  <hr>
  
  <p>For example, I want to install my_ext.xpi (ID: my_ext@my_site.com, Path: c:\myapp\ff_addons\my_ext.xpi).</p>
  
  <p>Could you talk me how can I install my extension ?</p>
  
  <p>Which firefox's versions support this method ?</p>