How can i get rid of the (new ?) searchbar in de Bookmarks Sidebar ?

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */

/* hide sidebar selector */
#sidebar-header {display:none!important;}
/* hide sidebar search container */
#sidebar-search-container {display:none!important;}

You can add code to the <b>userChrome.css</b> file below the default @namespace line. *http://kb.mozillazine.org/userChrome.css <hr> <pre><nowiki>@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /* only needed once */ /* hide sidebar selector */ #sidebar-header {display:none!important;} /* hide sidebar search container */ #sidebar-search-container {display:none!important;} </nowiki></pre> <hr> You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the <b>about:profiles</b> page. *Help -> Troubleshooting Information -> Profile Directory:<br>Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder *http://kb.mozillazine.org/Profile_folder_-_Firefox *create the <b>chrome</b> folder (lowercase) in the <xxxxxxxx>.default profile folder if this folder doesn't exist *use a plain text editor like Notepad to create a (new) <b>userChrome.css</b> file in the chrome folder (file name is case sensitive) *paste the code in the userChrome.css file in the editor window *make sure that the userChrome.css file starts with the default <u>@namespace line</u> *make sure that you select "All files" and not "Text files" when you save the file via "Save file as" in the text editor as userChrome.css.<br>otherwise Windows may add a hidden <i>.txt</i> file extension and you end up with a not working <i>userChrome.css.txt</i> file

After 30 minutes of reading & re-reading i finally figured it out. Somehow it was like learning another language ... ;-) I am grateful for your help: thank you so much master cor-el !!!