这可能是一个持续的错误。 此线程报告类似的问题。 / p>

啊 - 这是解决方法。
你把你的图标放在你的插件目录根目录下的 data 文件夹中，并把它们称为，就好像

  {... 
 icon：{16：./icon- 16.png，32：./ icon-32.png，64：./icon-64.png}，
 ...} 
 

当我这样做的时候，图标显示在工具栏中。这是不是很清楚，但如果你一块东西放在一起，的你可能从这里推断出来。

I'm working on developing a Firefox add-on using the Add-on SDK. My extension is working fine when using SDK, but when I create the .xpi file to add it manually to the browser, it does not show the extension icon.

I tried to change the icon path in the package.json file, but still it didn't shows the icon.

package.json file:

{...
  "icon"        : "Phone-icon48.png",
  "icon64"      : "Phone-icon64.png",
...}

Widget panel used to display icon:

WidgetPackage.Widget({
  label: "Phone Dial",
  id: "phone_dial",
  contentURL: data.url("images/Phone-icon19.png"),
  panel: panel_name
});

Can anyone help me resolve the issue?

Thank You.

This may be a persistent bug. This thread reports a similar problem.

Ah - here is the solution. You put your icons in a folder called data in the root of your addon's directory and call them as if they were in root.

{...
    icon: { "16": "./icon-16.png", "32":"./icon-32.png", "64": "./icon-64.png" },
...}

When I did this then the icons show up in the toolbars. It isn't very clear, but if you piece things together, you might deduce that from here.