superlogout.comは安全ですか？

GOING TO THIS SITE WILL LOG YOU OUT OF ALMOST EVERYTHING IMMEDIATELY. YOU HAVE BEEN WARNED. I've been told however that it won't be able to log you out of Imgur, Reddit, Papa John's, Ello, Stumbleupon, PornHub XTube or Facebook. I have not tested this however. Imgur requires some session metadata be included with the logout request so it won't work. Reddit's logout is a POST request, not GET so it won't work. Facebook's logout is a POST request, not GET so it won't work. Thanks to /u/JadoJodo for the info. Aside from that, it seems like a fairly useful site if you wish to logout of everything quicky. That said, it can also be used as a prank.

Superlogout website is one that will make your logging out process very simple if you use multiple accounts in one browser and want to simplify the process. logout Going through the source code of the web page, I found that the website is using a simple JavaScript code that loads the logout URLs of all below mentioned Online Services and deletes your login sessions.

tries to load the log out page of various sites as if they were images. the HTTP requests to those sites are real and the listed sites may choose to do whatever they would do when you click "log out" or "sign out". this is a good example of cross-site request forgery. there is a risk of data loss if you have any unsaved comments on another tab or window in the same browser. source code of the page is well written and easy to read. useful if you actually want to log out of a bunch of sites at once. it is unneccessary to depend on this site, you can use your browser's "delete browsing history" to delete cookies and other site data instead.