mozilla-https-everywhere -- good to include?

[Raphael Groner]

> This is one of my favorite addons, but it does break some sites.

I agree that https everywhere can be quite useful, but it's not
guaranteed that there's the same content available via both http and
https on each web server, due to they are mostly two different protocols
for the server configuration. Especially there should be a valid
certificate available.

Further reading:
https://forum.xfce.org/viewtopic.php?id=5833