Firefox 扩展保存在首选项中

发布于 2024-10-20 21:14:00 字数 850 浏览 5 评论 0原文

我想将一个简单的字符串保存到我的 Firefox 扩展的首选项中。该字符串应该可以在不同的浏览器会话之间以及重新启动后访问。我找到了以下代码，但由于某种原因它不起作用。我之前尝试过 localStorage，但这也不起作用：

保存功能代码：

var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefBranch);

var str = Components.classes["@mozilla.org/supports-string;1"]
      .createInstance(Components.interfaces.nsISupportsString);

str.data = window['myglobalvariable'];

prefs.setComplexValue("myglobvar", 
      Components.interfaces.nsISupportsString, str);

检索功能代码：

var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefBranch);

var value = prefs.getComplexValue("myglobvar",
  Components.interfaces.nsISupportsString).data;

我不明白为什么它不起作用。

原文

I want to save a simple string into preferences in my firefox extension. The string should be accessible between separate browser sessions and after reboot. I found the following code but for some reason it is not working. I tried localStorage before but this was also not working:

Code for saving function:

var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefBranch);

var str = Components.classes["@mozilla.org/supports-string;1"]
      .createInstance(Components.interfaces.nsISupportsString);

str.data = window['myglobalvariable'];

prefs.setComplexValue("myglobvar", 
      Components.interfaces.nsISupportsString, str);

Code for retrieval function:

var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                .getService(Components.interfaces.nsIPrefBranch);

var value = prefs.getComplexValue("myglobvar",
  Components.interfaces.nsISupportsString).data;

I cannot figure out why is it not working.

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