About omni.ja (formerly omni.jar)

  • Revision slug: Mozilla/About_omni.ja_(formerly_omni.jar)
  • Revision title: About omni.ja (formerly omni.jar)
  • Revision id: 30225
  • Created:
  • Creator: Standard8
  • Is current revision? No
  • Comment Make more generic so that it applies to Thunderbird as well.; 14 words added, 41 words removed

Revision Content

{{ gecko_minversion_header("2.0") }}{{ draft() }}

Firefox 4 and Thunderbird 3.3 achieve performance improvements by moving many of their internal parts from being standalone files or sets of JAR files into just one JAR file called omni.jar; this reduces the amount of I/O needed to load the application.

Note: When extracting omni.jar, you may incorrectly get false warnings from some virus protection software.

Several unzip tools and archives (including 7-Zip) currently cannot read omni.jar, due to the optimization that is applied to the file. It is suggested that Windows 7 users unzip the file by renaming it to omni.zip and using Windows Explorer to extract all files. Users of older versions of Windows can use InfoZip's UnZip tool (available at ftp://ftp.info-zip.org/pub/infozip/win32/unz552dn.zip) to extract files - make a copy of omni.jar, and drag-and-drop it onto unzip.exe.

omni.jar contents

The omni.jar file contains assorted application resources:

chrome.manifest
The chrome manifest file.
/chrome/
User interface files for the application
/chrome/localized.manifest
Manifest of localized content; referenced by the main chrome manifest file.
/chrome/nonlocalized.manifest
Manifest of non-localized content; referenced by the main chrome manifest file.
/components/
XPCOM components the application relies upon.
/defaults/
Default preference files.
/modules
JavaScript code modules.
/res/
Miscellaneous resource files.

See also

Revision Source

<p>{{ gecko_minversion_header("2.0") }}{{ draft() }}</p>
<p>Firefox 4 and Thunderbird 3.3 achieve performance improvements by moving many of their internal parts from being standalone files or sets of JAR files into just one JAR file called <code>omni.jar</code>; this reduces the amount of I/O needed to load the application.</p>
<div class="note"><strong>Note:</strong> When extracting <code>omni.jar</code>, you may incorrectly get false warnings from some virus protection software.</div>
<p>Several unzip tools and archives (including 7-Zip) currently cannot read <code>omni.jar</code>, due to the optimization that is applied to the file. It is suggested that Windows 7 users unzip the file by renaming it to <code>omni.zip</code> and using Windows Explorer to extract all files. Users of older versions of Windows can use InfoZip's UnZip tool (available at <a class=" link-ftp" href="ftp://ftp.info-zip.org/pub/infozip/win32/unz552dn.zip" title="ftp://ftp.info-zip.org/pub/infozip/win32/unz552dn.zip">ftp://ftp.info-zip.org/pub/infozip/win32/unz552dn.zip</a>) to extract files - make a copy of <code>omni.jar</code>, and drag-and-drop it onto <code>unzip.exe</code>.</p>
<h2>omni.jar contents</h2>
<p>The <code>omni.jar</code> file contains assorted application resources:</p>
<dl> <dt>chrome.manifest</dt> <dd>The <a href="/en/Chrome_Registration" title="en/Chrome Registration">chrome manifest</a> file.</dd> <dt>/chrome/</dt> <dd>User interface files for the application</dd> <dt>/chrome/localized.manifest</dt> <dd>Manifest of localized content; referenced by the main chrome manifest file.</dd> <dt>/chrome/nonlocalized.manifest</dt> <dd>Manifest of non-localized content; referenced by the main chrome manifest file.</dd> <dt>/components/</dt> <dd>XPCOM components the application relies upon.</dd> <dt>/defaults/</dt> <dd>Default preference files.</dd> <dt>/modules</dt> <dd><a href="/en/JavaScript_code_modules" title="en/JavaScript code modules">JavaScript code modules</a>.</dd> <dt>/res/</dt> <dd>Miscellaneous resource files.</dd>
</dl>
<h2>See also</h2>
<ul> <li><a href="/en/Firefox_4_for_developers" title="en/Firefox 4 for developers">Firefox 4 for developers</a></li> <li><a href="/en/Thunderbird_3.3_for_developers" title="en/Thunderbird 3.3 for developers">Thunderbird 3.3 for developers</a></li> <li><a href="/en/Theme_changes_in_Firefox_4" title="en/Theme changes in Firefox 4">Theme changes in Firefox 4</a></li> <li><a class=" external" href="http://blog.mozilla.com/tglek/2010/09/14/firefox-4-jar-jar-jar/" title="http://blog.mozilla.com/tglek/2010/09/14/firefox-4-jar-jar-jar/">Firefox 4: jar jar jar</a> (blog post)</li>
</ul>
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