Can web browsers handle time travel into the past efficiently?

For example, you might want to look at some important information that you entered into a form one year ago.

It should be possible to search back into the past for this form and show what you entered into various fields.

Most important information is textual and so it should be possible to efficiently implement time travel into the past that shows the text on the web page.

Of course, you could take this idea further and have an API that apps could implement to provide time travel into the past if they can do so efficiently.

Using such an API, you could rewind the entire screen to any time and apps that support time travel would show their contents in the past.