Hides the sidebar because it takes up too much screen space for me, especially in Vertigo. I actually do like having the sidebar around though, so I wrote a Greasemonkey script that will move the sidebar to the top: http://userscripts.org/scripts/show/11244. I'd recommend using this CSS in Stylish in conjunction with that script -- this in Stylish to avoid flickering (because it doesn't have to wait until all page content is loaded to be applied), and then the Greasemonkey script to get the links on top.
Changes visited link color to red, for links in comment threads only, so you can see at a glance where in a thread you've left off. (If you want to make all visited links on livejournal red, change "a[href *='thread']:visited" to "body a:visited" in the code.)
In the Livejournal contextual hover menu, removes the "Add friend", "Remove friend", "Watch Community", "Stop Watching", "Join Community", "Leave", "Ban user", and "Send a virtual gift" links. Update 01-30-09: The "Ban user" link is removed. Update 10-05-08: The "Send a virtual gift" link is removed. Update 11-14-07: The "Send message" link is not removed.
I don't know about anybody else, but for me 800px (max width of the box) is not enough and there's a lot of wasted space left on the right side. This could be useful for HDTV/Widescreen monitors owners. P.S.: forgot to mention that it changes width on both "Edit Entry" & "Update" pages. If you want it to take effect on only one of those pages, just change: '@-moz-document domain("www.livejournal.com")' to '@-moz-document url("http://www.livejournal.com/update.bml")' or '@-moz-document url("http://www.livejournal.com/editjournal.bml*")' accordingly. Thnx, 90d for pointing that out.
Удалена реклама, счетчики, оставлены ссылки на комьюнити...
Personal style. Tweaks for Livejournal.com for portrait orientation.
Removing any ads on livejournal.com (also ads in profile & start page) author: http://moosatov.livejournal.com/
Removes LoudTwitter entries
For default style. Affects also other styles.
Good when you block userpics. Also good if you do not like new pin icon. Displays needed information on hover.