由于扩展标准的逐渐一致, 现在同一扩展代码库已经有可能同时用于Chrome和火狐. 下面是一个简单的工具栏按钮和弹窗(尚无任何实际功能):

代码库地址: nobodxbodon/suan1

所有代码:

manifest.json:

{

  "manifest_version": 2,
  "name": "算一",
  "version": "0.0.1",

  "description": "工具栏按钮, 弹窗中包含计算器",
  "homepage_url": "https://github.com/nobodxbodon/suan1",
  "icons": {
    "48": "图标/算-48.png",
    "96": "图标/算-96.png"
  },

  "permissions": [],

  "browser_action": {
    "default_icon": "图标/算-32.png",
    "default_title": "算一",
    "default_popup": "弹窗/主界面.html"
  }

}

弹窗/主界面.html

<!DOCTYPE html>

<html>
  <head>
    <meta charset="utf-8">
    <link rel="stylesheet" href="主界面.css"/>
  </head>

<body>
  <div class="按钮">你好</div>
  <script src="主界面.js"></script>
</body>

</html>

弹窗/主界面.css

html, body {
  width: 100px;
}

.按钮 {
  margin: 3% auto;
  padding: 4px;
  text-align: center;
  font-size: 1.5em;
  cursor: pointer;
}

待续…