CodiMD Book mode

## Disclaimer

* This extension is NOT developed by HackMD team.
* I develop this extension for personal use.
There may be undiscovered defects. Please think twice before use.

## Requested Permissions

* webRequest
Read security headers related to iframe
* declarativeNetRequest
Modify found security headers to make functionality working

## Notice

* Hostname must contains hackmd or codimd; otherwise, this extension will not enable book mode.
In the other words, if you host CodiMD without domain name, this extension is not for you.

## How to use?

1. Install extension
2. Open your note for book index (e.g. https://codimd.your.domain/note)
3. Add `book` to query string (e.g. https://codimd.your.domain/note?book)
4. Enjoy it

## Difference between this extension and HackMD

* Links will be opened in new tab
* HackMD
* [target=_blank] is added explicitly
* Starts with http (non-SSL)
* This extension
* [target=_blank] is added explicitly
* Cross-origin