#main-window[sizemode="fullscreen"] #addon-bar {
visibility: visible!important; }

#main-window[sizemode="fullscreen"] #addon-bar:not(:hover) > * {
visibility: collapse!important; }

#main-window[sizemode="fullscreen"] #addon-bar:not(:hover) {
min-height:3px!important; }

or that userChrome.css code work in both normal mood and fullscreen mood?

Hello I want to make the addon bar addon bar visible by bumping my mouse on the bottom of the page. I installed this userstyle but it's only work in normal mood not in fullscreen. https://userstyles.org/styles/37319/autohide-add-on-bar-fx-4 I uninstalled that userstyle and added this code to my userChrome.css file and it's only work in fullscreen mood: <pre><nowiki>#main-window[sizemode="fullscreen"] #addon-bar { visibility: visible!important; } #main-window[sizemode="fullscreen"] #addon-bar:not(:hover) > * { visibility: collapse!important; } #main-window[sizemode="fullscreen"] #addon-bar:not(:hover) { min-height:3px!important; }</nowiki></pre> I tried the following userstyle but the problem is the addon bar appear even without reaching the mouse to the bottom of the page https://userstyles.org/styles/55623/firefox-better-add-on-bar-status-bar so my question is how to make this userstyle https://userstyles.org/styles/37319/autohide-add-on-bar-fx-4 or that userChrome.css code work in both normal mood and fullscreen mood?

#main-window[sizemode="fullscreen"] #addon-bar {
visibility: visible !important;
}