On some forums, I believe those using Simple Machine Forums, such as http://forum.uqm.stack.nl, LibreJS causes a problem when editing posts or quoting posts where newlines are inserted. It seems, on inspection of the page source, that these forums insert "'" at various places (at seemingly regular intervals) in the textbox. LibreJS 4.9.2 replaces these with newlines, causing the annoying effect.
I've seen other, similar problems caused by these changes by LibreJS; for example, on https://www.thinkpenguin.com/gnu-linux/catalog, a link specified as " / ", which normally results in going to https://www.thinkpenguin.com/, is changed to "%20/%20", which causes the link to break, and on that same page, a link with otherwise stripped newlines has these newlines replaced with "%0A", breaking this link. Of course, this is likely more of a problem with the website itself, but regardless, LibreJS is causing some websites to break that would otherwise work in the browser just fine without Javascript. The problem only presents itself when scripts on the given page are blocked. If all Javascript is allowed on the page, either temporarily or via the whitelist, the problem goes away.
