Base64

It is a base64 encoder and decoder.
Simply by selecting and right click to choose encode or decode strings from any page.
Support Chinese, and this is the very beginning mind.

使用方法：
1. 鼠标选择任意网页文字，然后右击选择编解码。
2. 点开标签栏logo打开小窗口

v0.0.3
修复部分网页位置移动的问题。