Rivals is halfway through updating their message boards, if yours breaks with version 2, you can copy version 1 here and load unpacked: https://github.com/kayakyakr/rivals-board-enhancements.
Features:
All Views:
– Removes side bar
– Force wide – sets to 100% width
Forum View:
– Displays compact forum view
Thread View:
– Hides extra user details
– Replaces mobile avatars with normal avatars (gifs will display now)
– Shows rectangular avatars with max height/width of 96 px
– Compact view removes a lot of white space