The Channel Scrollbar is always visible, even when nothing is there to scroll.
As seen in Chrome:

As seen in Firefox:

same on demo.rocket.chat
same with Internet Explorer 11.
Rocket.Chat 0.59.3
Found this workaround in open.rocket.chat (I recall):
Administration -> Layout -> Custom.CSS
/* Hide Firefox scrollbar in left pane if not needed */
.rooms-list { overflow-y: auto; }
I can confirm the workaround from @Gummikavalier works.
The workaround works for Firefox, but not for InternetExplorer 11.
Will this workaround be added to Rocket.Chat ? I'm using 0.64.2, and still viewing this.
closed by #10367
Most helpful comment
Found this workaround in open.rocket.chat (I recall):
Administration -> Layout -> Custom.CSS