Dev : Tips : Disable XUL cache: Difference between revisions

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==nglayout.debug.disable_xul_cache==
See [http://developer.mozilla.org/en/docs/Setting_up_extension_development_environment Setting up extension development environment] at [http://developer.mozilla.org MDC].


<tt>nglayout.debug.disable_xul_cache</tt> is a Mozilla [[Firefox : FAQs : Edit Config|preference]] useful for extension developers. Basically when it is set to ''false'' (default), Mozilla caches chrome XUL and JavaScript (and more) in a file named XUL.mfl or similarly. Therefore, when making changes to your extension, you have to restart Mozilla in order to get new version used. As it is very inconvenient, many extension developers set this pref to ''true''.
[[Category:Redirects]]
 
However even when <tt>nglayout.debug.disable_xul_cache</tt> is set to ''false'', Mozilla forbids rewriting *.jar files that contain installed extensions. To overcome this, and to avoid having to repack every change you make, you can unpack the JAR file you want to edit and make it permanent by updating chrome.rdf to point to the unpacked files instead of the JAR:
 
===Using chrome.rdf===
We assume that the extension is installed in profile in this section. For global installation see next section.
 
'''''Important!! Backup your profile before editing chrome.rdf!'''''
<ol><li>Unpack the JAR file you have, say <tt>Profiles\default\extensions\{YOUR-EXTENSION'S-GUID}\my-ext.jar</tt> to the same directory. You will get (at least) <tt>Profiles\default\extensions\{YOUR-EXTENSION'S-GUID}\content</tt> directory.</li>
<li>In <tt>Profiles\default\chrome\chrome.rdf</tt> look for ''my-ext.jar!'' and delete it. For example replace this line
<pre>c:baseURL="jar:file:///D:/Firefox/Profiles/default/extensions/{GUID}/chrome/my-ext.jar!/content/my-ext/"</pre>
with this:
<pre>c:baseURL="file:///D:/Firefox/Profiles/default/extensions/{GUID}/chrome/content/my-ext/"</pre>
Note, that you should also delete ''jar:'' at the beginning of the path.</li></ol>
 
===Using installed-chrome.txt===
''Write me!''
{{msg:stub}}

Latest revision as of 19:53, 23 May 2007