清除HTML格式，如粗体、斜体、前景和背景颜色，然后复制为纯文本或替换节点。
This extension adds two new context-menu items to the right-click menu over selection context to:
1. Remove HTML formatting of the selected text
2. Copy plain text version of the selection to the user clipboard
The extension is equal to the Gmail's "Remove formatting" button and can bring this useful feature to all WYSIWYG HTML Editors.
You can also use the copy as plain text option to copy non-formatted textual data to a WYSIWYG HTML Editor.
