How to Fix: Firefox 57+ Status Bar

I used to use an extension called Status-4-Evar, which did a lot of neat things.  Mozilla has been ruining Firefox's status bar for a long time, and this extension let us get it back the way we wanted.  For me, I want an area of the screen where URLs and status text can appear, but does not vanish or move depending on where my cursor is.  I also don't want it to overlap with useful page real estate.  Basically everything the new Chrome-style corner status bubble is, I do not want.  Recently, Mozilla made more changes which make Status-4-Evar incompatible with new versions.

Many people would prefer to have their downloads and other extension icons down in the bottom bar as well.  That's where I used to have them, but it doesn't bother me terribly to have them up in the top bar instead.

This fix addresses only my consistent-status-area concern, not the icon stuff.  There are solutions out there which re-position and re-purpose the bookmark toolbar and let icons live there.  This is a much simpler and admittedly less-flexible hack.

Credit where it's due; I started with this:
https://github.com/MatMoul/firefox-gui-chrome-css


My solution is to create "~/.mozilla/firefox/(my profile)/chrome/userChrome.css" containing:

#browser-bottombox {
 height: 1.4em;
 border-top: solid thin #505050;
}
.browserContainer>statuspanel {
 left: 4px !important; bottom: 2px;
 transition-duration: 0s !important;
 transition-delay: 0s !important;
}
.browserContainer>statuspanel>.statuspanel-inner>.statuspanel-label {
 margin-left: 0px !important;
 border: none !important;
 padding: 0px !important;
 background: rgb(0,0,0,0) !important;
 color: silver !important;
}

window[inFullscreen="true"] #browser-bottombox {
 display:none !important;
}
window[inFullscreen="true"] .browserContainer>statuspanel[type="overLink"] .statuspanel-label {
 display:none !important;
}

Your mileage may vary, and unless you use a dark theme (like I do) you'll probably want something other than color: silver for the actual status bar text.

Mozilla, get your house in order.  Let us customize our browser; you are not Google or Apple, that is why we like you.

edit:
In newer Firefox versions, you'll need to enable toolkit.legacyUserProfileCustomizations.stylesheets in about:config.  The link above has updated css files as well; you'll probably want to start with those rather than using mine as a base at this point.