On both Fennec F-Droid 57.0.4, on LineageOS 14.1, and Firefox 58.0, on Ubuntu 16.10, websites such as https://www.bgemyth.net/forum/index.php timeout and end up displaying a blank page, when browsing using LibreJS 7.11. The problem goes away if I whitelist all JS from bgemyth.net.
Seemingly the site uses some non-free JS to position some background images, but it is handled much more gracefully by LibreJS 6.0.13 (on IceCat 52.3.0 desktop, and IceCatMobile 52.4.1). -- Michael GPG PubKey: https://www.vigovproductions.net/pubkey.asc (Fingerprint: FAFA F12C 4440 460A 89D0 A67F 8D31 13F7 D36F 833C)
Description: OpenPGP digital signature