JIRA super style up which moves issue content tabs as a nice bottom bar. And makes JIRA more compact too.

jira.css

@namespace url(http://www.w3.org/1999/xhtml);
 
@-moz-document url-prefix("https://pm.syncron.net/jira/") {
 
/* All pages */
#footer-logo {
    display: none !important;
}
 
section#content {
    padding: 0px 1px 16px !important;
}
     
#announcement-banner {
    display: none !important;
}
 
/* Issue page, tabs */
#issue-tabs {
    background: #f2f2f2;
    border: 1px solid gray;
    /*border-width: 5px 2px 2px 5px; using box-shadow instead */
    border-width: 1px 0 0 1px;
    border-top-left-radius: 40px 40px;
    border-top-right-radius: 6px;
    border-bottom-left-radius: 6px;
    box-shadow: 0 0 15px 0px #ccc;
    top: auto !important;
    bottom: 0px;
    right: 0;
    /*right: 0px;*/
    /*margin-left: -300px !important;*/
    position: fixed !important;
    padding: 11px 10px 10px 25px !important;
    width: auto;
    z-index: 100;
}
/*#issue-tabs:hover {
    font-size: 120% !important;
    border-radius: 30px 4px 0 4px;
}
 
#issue-tabs {
    font-size: 80% !important;
}*/
 
#issue-tabs > li:hover {
    outline: 1px dashed orange;
}
 
#issue-tabs > li.active {
    background: #f2f295 !important;
}
 
#issue-tabs > li {
    border-radius: 10px !important;
}
 
#issue-tabs * {
    border: none !important;
    background: none !important;
}
     
#issue-tabs *[data-key='com.atlassian.jirafisheyeplugin:crucible-issuepanel'] {
    display: none !important;
}
 
/* Search results: save space */
body.page-type-navigator #content .content-related {
    padding: 16px 2px 16px 5px !important;
}
 
body.page-type-navigator #content .content-body {
    padding-left: 10px !important;
}
 
body.page-type-navigator #content .content-body .navigator-content {
    margin-right: 8px !important;
}
 
#issuetable .summary {
    -moz-hyphens: auto;
    hyphens: auto;
    /*word-wrap: break-word;*/
}
 
/* Dashboards */
.dashboard.v-tabs > .tabs > li > strong {
    padding: 0.4em 0.5em 0.2em !important;
}
 
}