Firefox缓存我的扩展程序。 如何避免呢？

Question

I simply want to include jQuery and then my custom JS file to call ready() event. For testing I put an alert on my .js file, it worked fine. Now when I change content of my js file it keeps giving same old alert. In console now it shows:

Could not read chrome manifest 'file:///C:/Program%20Files/Mozilla%20Firefox/extensions/%7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D/chrome.manifest'.

Why is it so hard to call JS files, specially jquery functions?

My files content given below:

chrome.manifest

content myext content/
overlay chrome://browser/content/browser.xul chrome://myext /content/myext.xul

myext.xul

<?xml version="1.0"?>
<overlay id="Scrapper-Overlay"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script type="application/x-javascript" src="chrome://fbpicker/content/functions.js" />
</overlay>

functions.js

Initially I put alert('test'); it popped up. Later I put:

window.addEventListener('load', function () {
    gBrowser.addEventListener('DOMContentLoaded', function () 
    {
        alert("addd");
    }, false);
}, false);

But it is keep showing test as popup.

Why FF is caching the content and how to remove it?

On Console I am getting following warnings:

Timestamp: 8/6/2013 2:15:32 PM
Warning: XUL box for _moz_generated_content_before element contained an inline #text child, forcing all its children to be wrapped in a block.
Source File: chrome://global/content/bindings/toolbar.xml
Line: 382

Timestamp: 8/6/2013 2:15:32 PM
Warning: XUL box for _moz_generated_content_before element contained an inline #text child, forcing all its children to be wrapped in a block.
Source File: chrome://global/content/bindings/browser.xml
Line: 0

Timestamp: 8/6/2013 2:15:34 PM
Warning: Key event not available on some keyboard layouts: key="b" modifiers="accel,alt"
Source File: chrome://browser/content/browser.xul
Line: 0


Timestamp: 8/6/2013 2:15:30 PM
Warning: Unknown property 'order'.  Declaration dropped.
Source File: resource://gre-resources/ua.css
Line: 46

Answer 1

See the "Setting up an extension development environment" article on MDN, in particular the bits about nglayout.debug.disable_xul_cache . Also, the Firefox extension proxy file is very useful.

While the page talks about Firefox a lot, most of the content also applies to other mozilla-powered apps, such as Thunderbird, Seamonkey or InstantBird.

JFYI: Using jquery in extensions, in particular XUL overlay based ones, while somewhat discouraged, is OK, as long as you preferably load it as a subscript , or at least .noConflict() it. This is because overlays share the same scope/namespace. See JavaScript Object Management from the XUL School tutorial for more information.