#sellorderlist td, #buyorderlist td {
text-align: right !important;
}
#sellorderlist_wrapper th, #buyorderlist_wrapper th {
text-align: right !important;
}
}
The userContent.css is located in the "chrome" subdirectory in your Firefox profile.
If the file does not exist, create it. Some versions of Firefox may already have userContent-example.css in that directory - if you see such file, then you're in the right directory.
There was also some code that was supposed to hide vertical scrollbars, but unfortunately, it was causing glitches in Firefox, so I've not included it.
All credit goes to the original author....
Thank you for support! This is very useful!