You can watch Nicovideo without an account using the UserScript

You can
Watching Nicovideo without an account
You cannot
Watching Nicovideo for exclusive use of members
Watching Niconama(Live)
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How to use

If you use Firefox, install Greasemonkey. If you use other browser, please search how to install a UserScript.

Next, install niconico4guest.user.js. Then, you can watch Nicovideo.

License

This program is freeware. And, It is released under the MIT License.

Contact

Install

2017/10/30 Newest version is 0.0.8