Can add the option to view the original webpage before or after the webpage

[NOBB2333]

Sometimes we save html some thing lost we need to sava again, but can't find origin link, can add some direct to origin html
like
有时我们保存html丢失的一些东西需要重新保存，但找不到原始链接，可以直接添加一些到原始html

[gildas-lormeau]

You have to display the infobar to fix this issue.